A/N As requested by @criss_colfer_665 here is part 2.

TRIGGER WARNING: Mentions of death

He'd managed to make it out alive. Of course he did, Marvin had been used to escaping situations like that. But he'd lost Whizzer. While running down a long corridor, the two men took different paths. Marvin wanted to go looking for him, but he would probably be dead before he found Whizzer. A year had passed since the incident and Marvin was certain he was the last person alive in the US. He could have been the last in the world for all he knew. The stress of surviving mixed with the uncertainty of safety was starting to take its toll on him. 

It was cold May night and Marvin had managed to hide in an old tree house somewhere in the south. He'd barricaded the door as best he could, but if a swarm came looking he wouldn't survive. But Marvin was far past caring. He felt numb. Numb to the core. He'd found his soulmate, someone who he believed to be dead already. But he certainly could be now. Marvin had never felt this low in his life. But Marvin had to focus on the new task at hand.

Marvin wanted to find the cure. The cure that had gone missing all those year ago. Sure he wasn't a scientist and had no idea what went into the cure. But if he could at least try and save the population, he would. Marvin had managed to track down the original base via the tracker. It was around 12 miles away from where he was staying. He set of that night.

~~ 4 Hours Later ~~

Marvin had made it to the base and it was clear that it had definitely been over run at some point with plague monsters. Door were destroyed, the security towers were falling down and half of the building looked as though it had been burnt down. As if on cue, the rain started to poor. Marvin pulled up his hood and ran into the building.

 He weaved his way through the corridors until he came across the lab. It looked untouched. The walls were still a pristine white colour, nothing was broken and surprisingly someone was working.

"What the fuck?" Marvin laughed.

The man turned round and pulled out a gun, "Are you infected?" he snapped.

"No! No I'm not, I'm clean." Marvin replied as he raised his hands in the air.

"Quickly shut the door before they hear us." The scientist said, putting his gun away.

Marvin shut the door behind him and approached the station the man was working at.

"I'm Professor Mendel, but Mendel is fine."

"Marvin, how long have you been here?"

"Since the start, I'm the last one left. It's hard to make a cure on your own when it's supposed to be a ten man job." Mendel laughed, but Marvin didn't find it funny.

"Why can't you just copy the cure you had before? Surely that's easier than running the tests again." Marvin stated.

"I would, if that were the case."

"I don't understand."

"There's never been a cure, so I have to start from scratch." Mendel casually said as he began to mix two different coloured liquids.

"Excuse me!"

"There's never been a cure. The government said it to keep up moral, so people wouldn't just give up. But then that put pressure on us scientists."

"There's never been a cure. Ever!" Marvin shouted.

"Now I understand that this is alarming, but I'm close to fin..."

"I promised my dying friend that I would find a cure for her and make sure that everyone was given a dose. And your telling me that it was all false hope."

"Not exactly. I'm nearly done. But I need to get to Chicago and without a tracker there is no way I'd make it there alive."

Marvin chuckled, "I have the tracker. Do you have a car?"

"I don't have a car, but I'm sure we could use one of the military tanks that was left here." Mendel laughed.

*** 

It took just about a day to get to Chicago in the tank. They managed to park close to the governments underground bunker.

"Be careful, be alert. Those things are still roaming around here." Marvin said as he pushed open the door.

"You've been here before? How do you know there for around." Mendel asked as he unloaded the cure bag from the tank.

"Because I lost my soulmate here."

Mendel didn't ask anymore, he knew it was a touchy subject by the way Marvin ran down the stairs and far away from the lingering conversation.

***

The building was even more beaten up than the last time Marvin was here. 

"Where do we have to go?" Marvin asked.

"Well there should be a room in this base somewhere where we can plug in the vials so the cure can be dispersed globally. And hopefully the plague will end." Mendel smiled.

A loud bang echoed through the corridor.

"We need to move now." Marvin grabbed Mendel's arm and dragged him down the corridor.

"The room should look like the one at the other base, hopefully." And as if the walls had heard Mendel, the room was at the end of the corridor.

Mendel rushed into the room first and began entering the code. Within seconds he'd managed to unlock all the systems. A small device started to rise out of the table. 

"Marvin we need to start plugging the vials into the slots. Then I'll enter the last code and the cure will start to spread." 

"We need to be quick, they're at the door."

The two men, with shaking hands, slotted the vials into the system. When the last one was placed in, the door broke down.

"Mendel keep workin. I'll keep them back."

Marvin grabbed a metal pipe that was on the floor. He charged at the group and beat them with the bat. It wasn't enough force to kill them but it was enough to knock them out. Within minutes the plague monsters were on the floor, except for the one that stood in the doorway. It simply stood watching.

"What's it doing?" Mendel asked.

"Nothing. He's doing nothing. I don't think he can." Marvin smiled.

"is that them? Your soulmate?" 

"Yeah that's him. That's Whizzer." 

Mendel smiled, "Be with him, this could hurt. I don't know if everyone is strong enough to handle it."

Marvin walked over to Whizzer. He smiled and held Whizzer's hand. Whizzer tried to pull away but that made Marvin hold on tighter. 

"I don't care Whizz, I'd rather be with you than stay away." 

Whizzer's eyes softened. The two leant against the wall and sat down. Marvin wrapped an arm around Whizzer who, in return, did the same. 

"I love you Whizzer."

Whizzer's head shot up and he smiled. He tried to talk but he couldn't. Instead he pointed to himself, made a heart shape with his had and then pointed at Marvin

"Are you ready?" Mendel asked.

"As we'll ever be."

As Mendel pressed the button, Marvin considered himself lucky. Most of the time, the words written on your arm were the last words your soulmate would say to you. But here he sat with Whizzer by his side, speaking to the latter as if the words were nothing. he looked down at Whizzer's arm and saw the text rewriting itself.

I love you Whizzer

Marvin quickly lifted his arm up.  He thought about it for a seconded and then his heart sank. Screams filled the room as the once plague ridden monsters change back into their normal selves. Tear slipped down Marvin's cheeks. He looked down at Whizzer. There was no scream from him, no movement. He was still with a small smile on his face. Marvin leaned close to him and kissed his forehead.

"Marvin it worked, they're all okay. We did... oh." Mendel knelt down next to the two men and felt for Whizzer's pulse. "He still has a pulse, it's just very low. There's a hospital down the street. We could see if they have any working equipment left."

Marvin shook his head. He lifted up his arm to show Mendel. Mendel felt his his heart break for the other man. A thick Horizontal line replaced the words. Death of a soulmate. Marvin felt his old phone begin to ring in his pocket. He checked the caller ID.

Charlotte is calling...

Marvin smiled and answered the facetime call

"Marvin? Are you there? Are you okay?" Charlotte asked in a panic.

"I'm fine, how are you?" Marvin smiled, glad that his friends were okay.

"We're okay. Cordelia just woke up."

"We made it Marvin." He heard Cordelia shout as she made her way onto the screen, "Are you sure you're okay? Your eyes are red."

"I found my soulmate, but I don't think he will survive the cure process."

"Marvin we're so sorry." Cordelia replied.

"We'll give you some space, call us when you're back home." Charlotte smiled as she ended the call.

***

"What now?" Mendel asked.

"We start again." Marvin said holding Whizzer close, "Try this living a life thing one more time I guess."

Marvin moved himself away from Whizzer and stood up.

" I think I'm going to try find my wife. I'm starting to forget what she looked like." Mendel laughed as the left the room.

"Well good luck Mendel. Hopefully we'll meet each other again."

"Of course we will. We cured the world from a plague. I'm not exactly going to let that go ignored. You're visiting me and my family at Christmas. Bring your friends too."

Marvin laughed, "Sounds like a plan to me."

Marvin felt his arm twitch. A burning pain began to shoot up his arm. A small infinity symbol draw itself on Marvin's arm.

"Hey! You forgot me!"

Marvin turned round and there he stood. As fit as a fiddle. Whizzer Brown. Alive and well. 

Marvin smiled and Whizzer ran to catch up with them.

Stranger things had happened, nothing could surprise him anymore. Marvin placed his arms around Whizzer and Mendel's shoulder as the three men left the building.

What happened next? Well that's for you to decide...