Going to a wedding on another earth, fighting off evil doppelgängers from a second different earth, confessing feeling and making out with the person you've been holding your feelings in for.

Following that, is having a chat with the ex-boyfriend and his wife explaining how in the future they're a group of heroes named the Legion that exist because of the heroes of this time, Spider-Man and Supergirl and Mon-El used them to inspire others.

"So, a legion of superheroes. Ha!" Winn says to that news.

"Sounds formidable." J'onn says.

"Not nearly enough. The future has some bad things happening." Mon-El tells them.

"The darkness is spreading." Imra adds on.

"What's that mean?" Peter asks.

"My team and I were on a mission and...we got into some trouble. Our ship got knocked into one of those distributions." Mon-El explains.

"A wormhole." J'onn interrupts.

"We crash landed back on Earth 12,000 years ago." Imra finishes.

"So you time traveled by accident?" Alex asks.

"Which is exactly why we couldn't just go home. So we went into cryosleep and set the ship to wake us up when we returned to the 31st century. But then the torpedo hit the ship, and damaged it, that's when I woke up." Mon-El tells them. "But do you think we can fix it? Help us get home?"

"We'll do everything in our power to help." J'onn promises them. "But for now, settle in."

"You might be here a while." Alex says as they break up.

"If anyone can help us, it's you." Imra tells Kara and Peter.

"Everyone's coming over to my apartment for a holiday tonight." Kara offers to them. "You guys are welcome to join, if you like."

"Thanks. But we need to work on the repairs." Mon-El says as they walk off.

Kara quickly pulls Peter into a training room where there are no security cameras and quickly pulls him for a kiss in shock Peter happily returned.

"Look at that. I have the Girl of Steel in my arms." Peter says as he wraps his arms around Kara who wraps her arms around his neck.

"I have the spectacular Spider-Man wrapped around my hand." Kara says as she keeps kissing him.

"We still gonna tell everyone tonight?" Peter asks as Kara also planed at the dinner, they were going to tell everyone they were together since they don't want to hide their relationship.

"Yeah, of course." Kara tells him as they separate.

"Well, I gotta go. I'll make a few trips around the city. Get the crime out of the way." Peter says as his suit forms on him from his new watch he perfected after the Earth-X invasion.

-

That night, it was their usual friends, Lena, James, Myr'nn and J'onn, along with Winn all together for the Christmas party.

"Dude, I don't understand your obsession." Winn says to J'onn.

"It is the greatest Christmas song of all time." J'onn tells him.

"That's great, we've played it, like, four times." Winn reminds him.

"If my father learns nothing else's this holiday season, he will learn Hall and Oates. Put it on." J'onn says and Winn puts on Jingle Bell Rock.

"Seriously? Again?" Peter asks from across the room as everyone else complains as well.

"No, no, take it up with papa bear, okay?" Winn tells them.

"J'onn, I do not know why you introduced me to coffee first. This brown water is vastly superior." Myr'nn says as he drinks hot coco.

"Yeah, I don't take advantage of hot coco enough." J'onn says.

"I enjoy Christmas. What a wonderful way to close your year. Paying homage to an evergreen creature." Myr'nn says looking to their decorated tree. "It reminds me of Life Day."

"Wait, Life Day?" Peter and Winn ask at the same time.

"Like the Star Wars Holiday Special?" Winn asks. "It was on CBS."

"Princess Leia, like, sang a song...not many people will acknowledge its existence." Peter adds on and see his confused state and looks to Myr'nn. "He probably has no idea what we're talking about. Probably doesn't even know what Star Wars is all together."

"Wait, do you know what Star Wars is?" Winn asks J'onn.

"Seriously? Empire Strikes Back is the best movie sequel of all time." J'onn answers.

"I just love you more and more each day." Winn says as Peter leaves the two to explain to Myr'nn what a sequel is.

"As far as parties go, this one doesn't suck, right?" Kara asks Alex.

"No, it's great. But how about you? What's the smile you have on for?" Alex asks her sister.

"What? Me? I'm always smiling. I love parties. And Christmas. That's why I'm smiling." Kara quickly says, trying to lie.

"Does it have to do with Mon-El being back?" Alex asks.

"No, it's fine. Everything will be explained soon." Kara promises when a knock comes and Alex answers and it's Sam and her daughter, Ruby.

Alex and Ruby talked over Supergirl, James and the Jon'zz family talk as Peter calls Kara over to talk in private.

"So, when do you think we should tell them?" Peter asks her.

"I say sometime maybe before or after dinner." Kara says when J'onn approaches them saying there's trouble and they're needed.

-

Peter and Kara make to the location and see a field.

"What happened here?" Kara asks the agent Vatzique.

"Looks like someone took a large flamethrower to large swaths of the property." Vatzique tells her.

"Any chance it was just a brush fire?" Peter wonders.

"I don't think so." She tells him.

"But why call us for arson after the fact?" Kara asks, seeing no reason for them to be here.

"There's something you should see from a birds eye view." Vatzique says and the two heroes are confused and they take to the sky and look down at the field and the shape of a skull is made.

-

Kara and Peter go to their own holographic version of their parents and they both give the same answers of how they don't know anything about the symbol as it comes from a superstitious time of Krypton so they don't know anything about it.

Not only that, but the same symbols are appearing all around the city which could mean bad things are going to happen.

So the two of them have decided to hit the alien bar for answers, hoping somebody can tell them what's happening.

"See that things didn't exactly go our way with the dinner plan." Peter says on the way.

"Yeah, well find the right time to tell them." Kara promises.

"Yeah, I just don't want to go though that HR seminar again." Peter states.

"Wait, we would have to go through that again?" Kara asks, remembering when she went through that with Mon-El.

"Not unless we tell them outside work." Peter hopes, that being one of the the weirdest things to go through but it was necessary for him and Gwen.

When they arrived there, they found Imra and Mon-El are there.

"Kara, Peter." Imra greets them.

"Oh, hey." Peter greets them and turns to Kara. "You want me to provide a distraction?"

"No need. Don't be silly." Kara says as they sit and join them. "So, you guys settling in?"

"Yeah. You know, Imra wanted to see what the times were like, so..." Mon-El tells them.

"Everyone's been very kind so far. It's fascinating to see Earth this far back." Imra tells the secret couple.

"Right, because everything here must be like being in caveman times." Peter replies.

"You eat things with your hands. So fun." Imra says looking at the BBQ ribs she's been eating. "Mon-El tells me there's a place in town where you can eat all the ribs you want. Food until you're full."

"It's actually all you can eat." Mon-El corrects her.

The four them are just there awkwardly not knowing exactly what to say when Kara gets a call from the prison, Thomas Coville to be exact.

He warned her that there are the marks of a devil named Worldkiller. First, comes the Mark of the Beast. Second, the Work of the Beast, on the form of dozens of deaths. Then finally, the Reign of the Beast.

And her rise will come at the fall of the House of Ren.

-

"I'm sorry, fall at the House of Ren? I'm the House of Ren!" Peter says as Kara informs him and the others what Thomas told her.

"So, Coville says that this is like the sign of the Devil." Winn asks. "A Kryptonian 666."

"Do you believe him?" Alex asks Kara.

"No." Kara replies, fearing if it is true. "I think Coville calling me is an excuse for him to feel relevant."

"It reaffirms the narrative he chooses to believe and gives his life purpose." J'onn says.

"We don't even know if the person burning these symbols is Kryptonian. It's probably just a bunch of vandals who don't even know what it means." Kara states.

"So you need fresh eyes?" Imra asks as they see her approach them. "I can take a look through the data you've collected, suspects you might have already dismissed. I'm the 31st century version of a kip."

"I think you mean cop." Peter corrects her.

"Kara, can we talk for a second?" Imra asks and Kara goes off with her. "I know that you and Mon-El used to be together. And I know how difficult me being here must be."

"No, no. Imra, it's fine." Kara assures her.

"Mon-El loved you, Kara. When he first arrived in my time, he spoke only of finding a way back to you. And he certainly didn't move on lightly. He wouldn't even look at another woman for years. Until he realized he wasn't going to find a way back. Just thought you should know."

"Thank you, Imra. I'm gonna head back to work." Kara says, leaving.

-

Later, they find an entire group of drug dealers were killed by a mysterious figure.

"Samples from the remains of the victims confirm they were killed by heat vision." Winn tells them.

"So, it's a Kryptonian." Peter guesses, not liking his odds without the Kryptonian-slayers.

"And Morgan Edge had nothing to do with it. At least it's not related to the guy with the laser gun who went after Lena." Winn says as James and Lena were attacked earlier when they thought edge did the symbols.

"That guy was just someone Edge hired to try to kill Lena." Kara replies.

"He thought he could get away with killing her and blame it on the Kryptonian?" Vatzique asks.

"Just like Coville said." J'onn reminds them. "Work of the Beast."

"The Devil is after me now. Great." Peter whispers.

"But Coville's a fanatic, not a prophet." Kara tries reassuring her boyfriend.

"The two don't have to be mutually exclusive. He said this, the Beast would come. She would mark the city and then She would take it. I think it's worth pushing through the noise here to see the truth."

"The moment you start believing in something, is the moment you give your power away. I'm not gonna give away mine." Kara promises. "So what we know about this Kryptonian is she's a pretender. Me and Peter were able to fight Karl, we can beat her down, too." She says and they break up and Peter chases Kara.

"Skirt, hold up." Peter calls and Kara stops for him to catch up. "Hey, you okay? You've just been...distracted."

"No, I'm fine." Kara reassures him. "It's just...this thing with Mon-El seems to be getting to me now." She admits.

"Hey, you still have me if you wanna talk as a friend if you need me." Peter reminds her.

"I know." Kara replies and wishes to kiss him, but doesn't want to do that with people watching them and them not knowing they're together. "Later, we will have to find a time to let everyone know we're together." She says when her phone goes off.

"Hey, someone just tried to heat vision Edge. He's calling a press conference." James informs her.

"Is he hurt?" Kara asks.

"Sadly, no. Of course this guy has a lead lined panic room in his office." James says. "But whatever's out there wants him dead, he just got lucky."

"We're on it." Kara says and Peter is waiting to be told what's happening.

"The Kryptonian attacked Edge in his office." Kara informs him.

"Oh...No? Is that bad? No, Yes, that's bad." Peter corrects himself.

"It doesn't matter who they were targeting, they're just killing anyone. The longer we wait, the more people are gonna die." Kara says and walks off.

"What do you think we should do?" Peter asks.

"We do it their way." Kara says before taking to the air.

Peter just stands there, wondering if he should've followed her. "So what do I do?" He asks himself.

-

Kara flies to the top of CatCo and burns her symbol on the helicopter landing pad and waits. She doesn't want Peter here in case this is what Thawne was talking about Peter dying.

She doesn't want to loose him when she just got him.

Later, the Kryptonian arrives and Kara sees her symbol is the same as the burn marks and she wears a mask covering her eyes and an all black suit.

"So you're supposed to be the Devil?" Kara asks her.

"The Devil isn't real." She responds in a disfigured voice.

"Then who are you?" Kara asks.

"I'm from the time before fathoming. Born to cleanse the scourge and deliver the awakening. I am Reign." She introduced herself.

"How did you get here?" Kara asks.

"I survived Krypron's death. Sent here upon its destruction." Reign tells her.

"If that's true, where have you been?" Kara wonders, since she's been here a long time and has never seen her.

"Dispensing justice." Reign replies.

"By terrorizing people? Killing people?"

"This world has sunken into chaos and sin. Too many have eluded judgement." Reign says.

"I'm not gonna let you hurt anyone else." Kara promises, knowing if what Coville is true, she's going to kill Peter. "Surrender now before I make you surrender."

Reign smiles at her, not caring. "So full of hubris. Just like the riteous Kryptonians who feared my makers. Worshiping falls gods as they watched our planet suffocate by shame and burn from memory. Stand down, or I will make you join them in their purgatory." Reign warns her.

"I'm not going to." Kara informs her.

"Then I will dispense my justice on you." Reign tells her and Kara dares her as the two start fighting in the air.

The two keep fighting as they fly into a Christmas Work party and they start evacuating as the two keep fighting.

Kara and Reign exchange multiple hits and kicks all through the office when Reign sends Kara sliding and Reign hits her through the ceiling.

During the fight, a repulser interrupts the fight and sends Reign down and slamming into a cargo ship.

Kara looks and sees Peter ha shade it to the fight.

"What are you doing here?!" Kara asks him.

"Saving your backside." Peter says when his senses go off to turn only for heat vision to hit him flying across the city.

Kara turns to Reign who's caught site of Peter's symbol, knowing it's the House of Ren symbol and has changed her sites on who she's after.

-

Peter goes in crashing into the street followed by Reign flying in and punching him before he could get back to his feet.

Peter uses one of his metallic limbs to push Reign back and him back to his feet and uses the other two to try and hold her arms back and starts punching her.

Reign breaks off his metal arms and smacks him in the face with it, damaging his mask and cutting his face as Kara flies in and punches reign into a building wall.

"Get back. Stay back." Peter warns everyone around them and feels his mask and sees he can feel his own face, meaning she damaged and cut through his nanotechnology.

Kara and Reign fight when she finally finishes the Girl of Steel and turns to Spider-Man.

Peter punches her in her stomach, seeing it as a weak point and Reign returns the punch, hitting him across his mask. Causing it to break even further and destroying his right eye socket, along with causing a mark around his eye to form.

Peter goes to hit her with a repulser blast, only for her to hold his arm and allows the repulser to fire, destroying his right hand repulser.

Dropping Peter to the ground, Reign grabs a piece of rubble and goes to hit Peter but gets interrupted by Kara getting back up and punching her.

Kara looks back to Peter and sees breathing heavily and is beaten when she gets tripped by a car door thrown by Reign, talking her down.

Peter looks and sees her down and starts to get back up when Reign flies at him, dragging him across the street and dropping him on top of a skyscraper beaten even more and his mask is starting to show his whole face. But his blood and bruises are hiding him enough so people wouldn't get a clear picture of him.

"I'm gonna kill you." Reign promises Peter.

Peter does his best to get back up, but his entire body feels like all of his bones are crushed and he's begin held down by a truck.

"I'm...I'm not afraid to you." Peter promises as he spits up blood while talking.

"You're no hero...just as I am no Devil. All I am is truth." Reign informs Peter before raising him into the air by grabbing his neck. "And judgement." Reign then holds Peter dangling over the edge of the building. "And death. And I will reign."

Then she drops Peter, sending him falling off the twenty story building and he falls unconscious as he hits his head onto the concrete sidewalk.

People start approaching as police and the news, along with the DEO. Kara was able to get back up a little beaten and they see the state of Peter.

"Is he dead?" Someone in the crowd asks and they don't have an answer to that.

Kara quickly picks up Peter and flies him back to the DEO for treatment, not wanting to loose him after remembering what Thawne said recently.