The ninja were being chased by Morro's Dragon.

Wu: Take positions.

They did so and saw Morro fly towards them.

Cole: Ah, I give you this much. That ninja never quits.

Morro's dragon shot fire at them.

Zane: Port side!

Nya dogged it. And Morro went to a new attack.

Cole: The cannons!

Jay jumped on a canon and fired, but missed. Morro kept firing at them.

Jay: Aah! Let me get this straight. You're just telling us now that you had another pupil before us, and now his cursed spirit has possessed Lloyd, all so that he can take your staff?

Wu: Morro won't stop until he gets what he's after. There's a secret message engraved on it. All these years, I had no idea.

Jay: Of course. Ha, just another day in Ninjago.

Pyther: Wouldn't be Ninjago if these things didn't happen.

They saw Morro fly closer.

Cole: If this is as fast as the Bounty goes, I think we're in for some serious trouble.

Morro laughed as he landed on the bounty and summoned two green blades.

Wu: I need ink and parchment to make an imprint to see what's on the staff.

Zane: Kai and I will take you to our quarters, while Jay and Cole will keep him busy.

Cole: Oh, that's honorable of you to nominate us.

Jay: Yeah, we didn't fare so hot last time. Why is it you get off with the easy task?

Zane: Because I'm the intelligent one.

He and Kai went with Wu leaving Jay and Cole.

Jay: Ah, let's take this guy.

They started to fight him. Nya and Pyther looked on.

Nya: Why am I steering the ship? There's a reason autopilot was invented.

She activated the autopilot and ran off. Pyther stayed by the autopilot just in case. Morro knocked Cole back.

Jay: Oh, great.

Nya used her boomerang blade to take away one of Morro's swords. Morro attacked her and she dogged it. But the attack made the autopilot deflate.

Nya: Oh, that's not good.

Pyther tried to steer the ship, but it didn't go well.

Pyther: If someone would like to help. That would be appreciated!

The ninja screamed as the bounty swerved. Morro made his way inside to Wu, Kai and Zane.

Zane: Our quarters aren't much further. Go, Sensei. Kai and I will hold him back.

Wu ran while Kai and Zane took care of Morro. The others held on trying to not fall off.

Cole: We'll crash if we don't stabilize the Bounty.

Nya made her way to the steering wheel and took over for Pyther.

Nya: Ugh. Come on, pull up. Pull up!

Zane and Kai fought Morro, but Zane was hit on the head with a crate. Leaving Kai to fight alone.

Morro: Your team will fall apart without its Green leader.

Kai: I'll lead them. And make sure you go down if it's the last thing I do. Sensei says you won't give up. Well, neither will I!

Jay and Cole catched up with Nya while Wu reached his room.

Jay: Ah! Are you aiming for that mountain?

Nya: Trying to rise above it! Ugh, a little help?

As Cole, Pyther and Jay helped out, Nya turned on the boosters. The bounty barely missed the mountain, making a hole in which Kai almost fell out of.

Zane: I'm coming, Kai!

He fell and slide away.

Kai: Aah!

Morro tried to make him fall by using his Wind. He then saw Wu.

Wu: You want the staff? Take it!

He threw the staff out and Morro chased after it. Zane caught Kai before he fell out.

Zane: Got you.

Morro summoned his dragon.

Nya: Primary thrusters destabilized, better hold on!

Morro caught the staff and laughed as the ninja crash landed in the Forest of Tranquility. He flew off.

Kai: Okay, let's never do that again. Are you okay Pyther?

Pyther threw up a little.

Pyther: Yeah. But I'm gonna stay away from rollercoasters for awhile.

Jay: Ah, just think, if Sensei hadn't gotten rid of the staff, it could've been worse.

Cole: Yeah, but now we don't know the message.

Wu: Not exactly. I managed to make an imprint.

He showed them the symbols.

Jay: But what does it all mean?

Wu: My father told me long ago that he would leave a message, leading me to his final resting place. After he passed, I looked everywhere for it, not knowing it was in my hand all this time.

Kai: You mean to tell us—

Wu: Yes. These symbols will lead us to the Tomb of the First Spinjitzu Master. Only problem is I haven't the foggiest idea what any of them mean.

Kai: Well, if Morro is trying to find the tomb, we gotta find it first.

Cole: Hey, maybe Misako can help decipher the clues since she's a total history buff.

Zane: Pixal, release the falcon and give her our location.

The falcon flew off.

Wu: Good, then we set up camp.

The ninja finished putting up a campfire and some logs to sit on.

Wu: Care to hear a ghost story?

Zane: If it means saving Lloyd, of course.

Flashback.

Wu: Morro may have been my first pupil, but he was also my greatest regret. Before he was a cursed spirit, it wasn't I who found him...but he who found me. My brother had just gone off to train under Master Chen, which gave me time to attempt my hand at teaching. Morro was the perfect student. He did everything that was ever asked of him.

During training, a young Morro fell over.

Past Wu: Get up.

Wu: I had shown him things he had never seen. And he showed me a few things too. He had a power over the Wind I had never seen. He was a descendant of an Elemental Master. It was then I thought I had found the one. Perhaps he would wear green.

Jay: Whoa, whoa, whoa! Back up. You're saying Morro, the Master of Wind, was gonna be the Green Ninja!?

The wind shifted, causing the fire to become bigger.

Cole: Uh, did that just happen? Maybe I don't like ghost stories.

Pyther held closer to his dads.

Zane: What happened next, Sensei?

Wu: After I told him he could be the Green Ninja, there was a hunger unmatched.

Past Morro kicked some of the others trainees, making them fall. He walked up to one aggressively.

Past Morro: Get up. Get up!

Past Wu: Enough.

Past Morro: But Sensei, I'm gonna be the Green Ninja. I need greater tests.

Past Wu: I said enough!

Young Wu left in annoyance, leaving Morro.

Wu: There was an arrogance in him. I feared I had made a terrible mistake. But it wasn't for me to decide. It was destiny. When the Golden Weapons didn't respond like they did for Lloyd later, I knew Morro wouldn't become the chosen one.

Past Morro: I'll train more. Learn more lessons.

Past Wu: I'm sorry, destiny has spoken.

Past Morro: Then I refuse to listen! I am the Green Ninja! You made me believe!

Wu: He became obsessed to prove me wrong. To prove destiny wrong. He became reckless. He thought he was invincible.

After Past Morro disturbed a Grundle, Wu had to save him.

Past Morro: You see, Sensei? It was destiny for you to save me. I can still be the Green Ninja.

Wu: I knew right there and then I could not teach those who would not listen. He told me he would find my father's tomb to prove he was worthy. I told him it could not be found. My father had left no message. I left the gate open in hopes he'd return, but he never came back. I am saddened he was banished to the Cursed Realm. But what worries me more is that he escaped, and for what reason? To save Lloyd and return your powers, you must find the tomb before he does. Or else.

Jay: Or else what?

Wu: Unspeakable power will curse us all.

Jay laughed nervously.

Jay: Just another day in Ninjago, am I right?

Kai: This is different. Lloyd is at stake.

Cole: But how can we compete against the Green Ninja? He's more powerful than all four of us combined.

Nya: Huh.

Zane: That was before we lost our powers.

Kai: But it's like Sensei said. Our real power doesn't come from our hands, it comes from inside here.

He tapped her chest.

Kai: This is Lloyd we're talking about. This is one mission we cannot fail.

Morro arrived at the Biker Tavern. He walked to the bartender.

Bartender: Thirsty?

Morro: Insatiable.

He took a drink.

Morro: Ah, it's been a while.

He interrupted a pool game to see the symbols on the staff.

Morro: Oh, of course.

Some people walked up to him.

Man #1: You're a bit young for a place like this, ain't ya?

Man #2: Wrong place to come if you ain't got friends, if you know what I mean.

Morro: Oh, I have friends.

He summoned Wrayth to fight them.

Wrayth: Ah, you know where you're going?

Morro: I do now. But make sure no one else tries to stop me.

Wrayth: Hmm. It'd be my pleasure.

Morro summoned his Dragon.

Wrayth: Nice ride.

Morro: Take one of your own.

Wrayth laughed as he possessed a motorcycle, turning it into a Chain Cycle.

In a dream, Kai walked up to Lloyd on the docks.

Kai: Don't worry, greenie, I'll watch over you from now on.

A Fangfish then consumed Lloyd.

Kai: Nooo!

Kai woke up panting. He looked around to see Cole walking over to him.

Cole: Don't worry it was just a nightmare.

Kai calmed down a little.

Kai: It felt so real.

Cole: Was it about Lloyd?

Kai: Yeah. I'm so worried about him. He's like a little brother to me. And when Morro possessed him, I felt the same as when Nya got kidnappad.

Cole smiled gently and hugged him.

Cole: Don't worry, we get him back. I promise. Come on. Misako has gotten our message.

They walked to the others and took some breakfeast.

Misako: As far as I knew, the tomb was only a fable, until I saw what's on the staff.

Kai: Does she know what the symbol means?

Cole: Not the last two yet, but get this: the first symbol means Airjitzu.

Kai: Airjitzu?

Misako: A lost martial art created by Sensei Yang, who passed years ago. If mastered, it allows one to temporarily take flight.

Jay: You hear that, Kai? We get to fly!

Wu: You haven't found it yet. The Scroll of Airjitzu is well guarded in the ancient Library of Domu.

Zane: Forgive me if I speak out of turn, but my records reveal it was recently stolen.

Jay: By who?

Cole: Ah, let me guess. Ronin.

Nya: Who's Ronin?

Pyther: Yeah. I don't know who it is.

Kai: Let's just say, he's not a friend.

Jay: But this is good news.

Cole: Uh, how so?

Jay: Aargh, 'cause if Morro doesn't know this, he'll be heading to the library.

Cole: And Ronin's most likely holed up in the village of Stiix, which gives us a head start.

Wu: Then it's set. The ninja will head to Stiix. We four will head back to the tea shop and start deciphering the next clues.

Nya: But Lloyd's my friend too. The ninja will need my help to—

Wu: I'm sorry, Nya. You're sitting this one out. There's too much to be done here.

Kai walked up to his Walloper and jumped on.

Kai: Don't worry, sis. With me in charge, this scroll will be ours in no time.

Jay: 'Cause time flies when you know Airjitzu! Get it? Haha.

Wu: Be careful, ninja, for the path we seek is never a straight line. Rely on each other to guide your way.

Kai: We will Sensai. Let's go.

Pyther: Good luck!

They left. Morro had just arrived at the Library of Domu. He then saw that the scroll was gone.

Morro: Aargh!

He turned to a monk.

Morro: Sensei Yang's scroll. Where is it?

Monk #1: Oh, yes. Sensei Yang will be sorely missed. His teachings will always—

Morro grabbed him.

Morro: Where's the Scroll of Airjitzu!?

Monk #1: It was s-stolen a-a few days ago by that thief they call R-R-Ronin.

Morro threw him and ran off. Bit got stopped by some monks.

Monk #2: Uh, excuse me. Uh, could we get your autograph?

Morro: Autograph?

Morro signed a paper.

Monk #3: You're the Green Ninja, right? Mind if we all get a selfie with you?

Morro grunted as they took a selfie with him. He then ran off. The ninja were traveling in a desert. Everyone but Kai sang.

Jay, Cole, and Zane: 92,898 bottles of tea on the wall, 92,898 bottles of tea. You take one down and pass it around, 92,8—

Kai: Enough! Your singing is starting to annoy me. So can we just focus on getting to Stiix, so we can save Lloyd.

Jay: Someone woke up on the wrong side today.

Kai glared daggers at him making him gulp.

Kai: Ugh, we've been following the sun for hours. We should've arrived at Stiix already.

Zane: But Stiix is on the eastern coast. We should be riding away from the sun.

Kai glared at him.

Kai: Why didn't you say so earlier? Now we've just wasted time.

They turned around.

Jay: Wow. I've seen Kai mad before. But not like this.

Cole: He cares about Lloyd very much. He's like a little brother to him. It's like he's reliving loosing Nya. We should've been the same if we were in him place.

Zane: You're right. But being that mad isn't healthy. He need to calm down.

Cole: On it.

He ride up to Kai.

Cole: Hey Kai. I know that you're worried about Lloyd, but you need to calm down. We'll save him and stop Morro. I promise.

Kai took a deep breath.

Kai: You're right. I'm sorry for how I acted.

Cole: It's okay.

Jay: We understand.

Zane: Don't worry.

Cole then spotted something.

Cole: Look! Train tracks.

Zane: They lead straight to Stiix.

Kai: Then let's go. And, mind if I join your singing.

The others nodded.

All: 92,897 bottles of tea on the wall, 92,897 bottles of tea, you take one down...

Wu, Misako, Pyther and Nya made it back to Steep Wisdom.

Nya: Who needs to go on an epic quest when my services are best needed here?

Misako turned to Wu.

Misako: You need to tell her.

Wu: She's not ready.

Misako: And you waited this long to tell them about Morro, and how did that go?

Pyther: She has a point.

Misako: Nya, dear, we didn't exactly hold you back to care for the shop.

Nya: Really? Then why?

Wu: Um, there's something I haven't told you about your parents.

Nya: Ah, you can save it. Kai already told me that Chen dangled that carrot too. We looked into it and we know our father used to be a Master of Fire. Not exactly mind-shattering.

Misako: But did you know your mother was the Master of Water?

Nya: I...I didn't know that. You mean—

Wu: Yes. As Kai took on the traits of your father to become a Fire Ninja, for the sake of saving Ninjago, you must train to become the Master of Water.

Nya dropped a jar and fainted.

Misako: Huh. You're right. She wasn't ready.

The ninja were still following the tracks.

Ninja: ...it around, no more bottles of tea on the wall.

They laughed.

Zane: That was enjoyable. Let's do it again.

All but Zane: No! Haha!

Jay: Uh, I wish Lloyd was here for that.

Kai: So do I. But we'll find the tomb. And then, we'll save him.

Cole: I wonder why the tomb's so important.

Jay: I don't know. Sensei says it holds unspeakable power.

Kai: It's the tomb of the First Spinjitzu Master. Whatever secret it holds, it must be protected.

They approached a train station.

Zane: Let's take a break here.

They then heard laughing.

Cole: Uh, did you hear that?

Jay: Yeah, I did, but...we're in the middle of nowhere.

They heard another laugh.

Kai: I don't know, but be on guard.

They then saw Wrayth on the Chain Cycle.

Jay: What is that?

Zane threw his shurikens at him but they just went through. He drove towards them.

Cole: Watch out!

They managed to jump aside.

Zane: My shurikens. They went right through him!

Jay: Because he's a Ghost!

Kai: Morro must have summoned some friends. We're sitting ducks out in the open. We need to take shelter! Watch out!

Wrayth almost hit them.

Jay: Oh, God, he's coming for another pass!

Wrayth destroyed the train station.

Cole: There is no shelter!

Wrayth used his chain on a Walloper.

Cole: He turned my Walloper into a Ghost. No one turns my Walloper into a Ghost!

Jay: Ugh, get outta here. Hyah! Hyah!

The wallopers ran off.

Kai: Where did he go? I can't see him.

Zane: Stay together.

Jay: If our weapons do nothing, how are we supposed to fight a Ghost?

Kai: I know that I've read about ghosts and their weakness. But it was long ago. I cant remember.

Jay: Well you better remember fast.

Wrayth appered.

Kai: There he is! Watch out! Ugh.

His leg got stuck on Wrayth's chain.

Kaya: Huh? That's not good. Aah!

Cole: Kai!

Kai got dragged but managed to free himself.

Kai: Don't worry! I'm okay.

Cole: He's gonna pick us off one by one, isn't he? There's nothing we can do.

Kai looked for him and then saw a glow coming from the ground.

Kai: He's underground. Aah!

Cole: Stand back.

Cole trapped his chain on a nearby water tower. He fell on the tracks. They screamed when Wrayth got up, but he then got run over by a train.

Cole: Haha. Now that's how you stop a Ghost.

But Wrayth appeared again.

Wrayth: You think a train can stop a Ghost? Your world will pay dearly when Morro finds the tomb. And when he does, he will take possession of the—

He pulled on his chain, splashing himself with water and dissolved.

Cole: What, uh, what just happened?

Zane: He went...ka-blooey.

Jay: Yeah, but he was just gonna tell us what was in the tomb. Couldn't it have waited another second?

Kai: We may not know what's in the tomb, but we do know one thing. How to stop a Ghost.

All but Kai: Water?

Zane: Unusual. I guess it's true. The path we seek is never a straight line.

Jay: Uh, speaking of straight lines, if that train's heading to Stiix, wouldn't it be faster if we...

They then ran after the train.

All: Hey! Wait for us! Slow down! Slow down!