A/N: So anyone who follows me on tumblr knows I've been toying with the idea of writing a Bechloe/Fallout AU. Well, here is chapter 1!

I didn't plan on getting back into fanfic for a while but the idea stuck with me and I had to write it. It's been a while since I felt that need to write a story so I figured I shouldn't try and fight it :P

Anyway, this fic is set in the Fallout 4 universe and the story will be similar to the games storyline, but for the most part I'll try and make it my own thing.

I don't know how big of an audience this fic will have, but I'm enjoying writing it so far :)

Please review and let me know what you think, or hit me up on tumblr (username is massivedrickhead)

As usual, I don't own Pitch Perfect or its characters and I don't own Fallout or its characters.

I shouldn't have left the vault.

That thought kept buzzing around Chloe's head as she finally succeeded in killing the rabid dog that was attacking her.

She hadn't be outside for long before being attacked, and she was seriously tempted to go back.

Sure, it was creepy, quiet, had no food, water, or medicine, was full of dead bodies and rad-roaches, but at least she was safe from attack there.

She wasn't sure what she had expected when leaving the vault.

She didn't even know how long she'd been down there. All she knew was the bomb went off as they were being lowered into the shelter. She doesn't think she'll ever forget the screams of those who were left outside. Her baby daughter Emily was in her arms as they were then ushered into what they were told were decontamination pods and then... Nothing. At some point she remembers there being a struggle and then nothing she woke up she was alone in the vault. Emily was nowhere to be seen.

I shouldn't have left the vault.

The bite on Chloe's arm was still bleeding heavily, and she wasn't sure where she was heading. She had been retracing the steps to her old house but when she got there, there was no house. Her whole neighborhood had gone. Grass had grown where houses once stood. It felt like yesterday when she was here last. In her comfortable house with her daughter. And now...

She thought about going back to the vault for safety but there was nothing there for her.

The only thing she could do was to carry on walking, in the hope of finding someone who could help her.

As she walked she thought about Emily. The thought of trying to find her was overwhelming. She could be anywhere. With anyone.

The sun was just beginning to set when she heard growling again. She didn't even have time to aim her gun before she was pinned to the ground by another dog. It was much bigger than the last one. Its claws digging in to her arms as she tried desperately to stop it biting her. Its jaws were snapping, centimeters from her face.

A bright red light shot into the dog and it cowered, letting Chloe go. Two more shots were fired and the dog stopped barking.

She tried to get up but the pain had become too much. The previous bite was still bleeding and now she had several other cuts on her arms.

Whoever it was that had killed the dog had began walking towards her. They were wearing a full suit of power armor, so Chloe had no idea who they were or what they looked like. They stood over her, and Chloe felt afraid again. She tried to reach the gun that had been knocked out of her hand by the dog. Just has her fingertips had brushed against the metal of the gun, the person above her kicked it away.

Blood was still pooling around her arm and she was starting to get lightheaded. She'd been walking all day, without eating or drinking.

I shouldn't have left the vault.

They bent down and touched her arm, inspecting the bite.

"Please," Chloe said, her voice trembling, "don't hurt me."

"I won't," a soft, female voice replied. She felt herself get lifted off the ground as she passed out.

Chloe woke up when she felt something nudging her. She opened her eyes and saw a dog, nudging her with its head. Chloe felt a surge of panic. Out of the corner of her eye, she saw a gun lying beside the mattress she was on. She grabbed it and aimed it at the dog.

The dog cowered, its tail between its legs, and whimpered slightly.

"Don't shoot my dog," the soft voice from before said. This time it wasn't muffled by the large helmet. She looked and saw a girl around her age, maybe slightly younger, with long brown, slightly curled hair, and deep blue eyes. "Dogmeat, come here boy."

The dog moved away from Chloe and went over to the girl, letting her stroke him behind the ear.

Chloe still didn't lower the gun. She felt sick and confused and afraid. Her arms had been bandaged but still hurt. She then noticed there was an IV in her arm, attached to what looked like a blood-bag, except that the contents was orange. It looked like RadAway. They used it all the time before the war to treat radiation poisoning.

"You know how to use that?" The girl said, nodding towards the gun, her arms crossed against her chest. Chloe nodded. "They teach you that in the vault?"

Chloe's brow furrowed for a second until she realised she was still in her blue Vault-Tec jumpsuit.

"Who are you?" Chloe asked, her throat dry and voice slightly croaky.

"I'm Beca," she said. "Beca Mitchell. I'm the person who saved your ass about an hour ago. Why don't you put the gun down?" Chloe hesitated and Beca sighed. "If you want to leave, I won't stop you. But you're injured,you're dehydrated and it looks like you've got radiation sickness. Why don't you let me help?"

"Why do you want to?"

"What's your name?" Beca asked.

"Chloe," she said.

"Chloe," Beca said, "there is a lot of shit in the Commonwealth. A lot of bad people. A lot of bad creatures. I want to be one of the good guys."

Chloe lowered her gun. "Okay," she said.

"You'll let me help?" Beca asked. Chloe nodded. "Good." She grabbed some things from a box near the mattress Chloe was on. "Hold still a sec." She took Chloe's arm and stuck a syringe-like object in it.

"What is that?" Chloe asked, wincing.

"Just a stimpak," Beca said. Chloe began feeling better. Beca reached out and swept the hair from Chloe's face, feeling her forehead. "How are you feeling?"

"Better," Chloe said.

"Still feeling sick?" Beca asked. Chloe shook her head. "You got some radiation poisoning from that dog. You should be okay now." She removed the drip from Chloe's arm, before handing her a can filled with water. "It's safe." She said, sensing Chloe's hesitance.

Chloe drank it quickly. "Thank you," she said.

"No problem," Beca said, smiling for the first time. The smile was genuine and slightly shy. Like she wasn't used to doing it. It made Chloe smile back.

Thank god I left the vault.