A/N: Hey guys! This is belle.0416 and Bubbly88Tay. We've recently (over the past...three months?) bonded over fanfiction and we started talking through social media (anything and everything). As some of you may know, we started a prompting thing a while ago, where we gave each other prompts and we wrote them and sent it back to each other, and published some of them. It was a lot of fun, and three days ago at about four in the morning for me, we decided to co-write something together. As a result, this little multi-chaptered fic popped out, and through-out the course of three days, with some reading, editing, laughing, me virtually slapping my internet, the first chapter of it was born.

I know this is a really long author's note, but I'd just like to thank our awesome beta Journalism13 (I haven't actually talked to her yet but from Bubbly88Tay's words she seems amazing.)

Without further ado...Chapter one!

-Belle xx

Running didn't really bother him. It never had and unless something major and drastic happened, running never will. So when asked whether he would run ten blocks after a perp, or chase a perp in a car for ten blocks, Jay would always choose the former of the options. He wasn't sure why, but he always preferred a good old fashioned foot chase when it came to driving around a crowded Chicago block, which ran a higher risk of killing civilians in his mind.

But his crazy ass partner didn't seem to have a problem with it.

"He's turning left down Walnut Street!" Jay yelled into radio as he held onto the handle above his seat. The car slid around around the corner, causing passerby's to watch as the sirens flashed in their windshield, followed by two other vehicles with flashing lights. The group of cars left Mozart St but Jay wasn't paying attention.

Or maybe he was. Either way, it didn't matter as Lindsay's erratic driving sent him flying into the door.

"Erin, I swear to god, if I die today, I will have no problem what-so-ever with blaming you."

"Oh, is that so." Erin smirked, barely taking her eyes off the road as she took another wide, right turn onto Albany Avenue.

"Yes, that is so. Now can you make it your goal not to make any old ladies piss themselves?" Jay scolded playfully over at her.

"If they happen to piss themselves, then maybe-" Her sentence was cut off as she focused herself on the task at hand. After at least five blocks of chasing the asshole in the other vehicle, she was finally starting to make headway on the whole idea of catching him. They slowly began to inch their way to their left. Jay took this as a cue and unbuckled himself, and rolled down his window. He grabbed his gun and shoved his upper body through the window as they got closer still to the vehicle. He held his gun steady and shot twice at the vehicle, almost like a warning.

In response, the vehicle very notably swerved towards him. Jay slid back into the vehicle just as it would have gotten really uncomfortable for him really quick. "Shit!" He yelled as he pounded his hand against the dash. "That was kind of close." He chuckled out harshly, breathing heavily.

Jay turned to look back out the window again as the car came a few inches from his side of the door. It quickly drove back into its lane, only for it to swerve one last time. This time it barely clipped his side of the car as Erin swerved to avoid the assholes.

Like a bunch of domino's Jay could feel their vehicle collide with the vehicle to his left. Erin's hands flew off the steering wheel right around the same time that Halstead slammed into the center council, then the dash board with his body. He wasn't sure what happened then, all he could feel and hear was crunching metal, and his own head pound against his window before he blacked out for what felt like only a second.

He felt the blood pouring from the wound on his head as he became aware again, but it wasn't what he was worried about as he reached over to check on Erin. The blood blinded him. Sirens blared in the distance, closer and closer until it was right beside him and the somewhat wrecked carnage of the car and giving his already throbbing headache whole new wave of pain.

"Erin." His voice came out raspy. Her head was against the driver's side, between the window and the airbag that had inflated in front of her.

Unmoving.

"Erin?" He tried to pull his leg out and succeeded as he unbuckled his seatbelt. He was acutely aware of the pain in his left shoulder. He doesn't remember getting hit there, but then again, he doesn't remember much from the last ten seconds. He reached over, hands still shaking and two fingers against her neck. "Lindsay…" His own pulse raced against his fingers until he wasn't sure whose heartbeats were whose anymore.

"Halstead? Lindsay?" The door on Jay's side opened. To his right, he could see and deduce that Olinsky, Ruzek and Atwater had gotten out of their cars.

"I need an ambo and a truck company at North Fairfield Avenue!" Jay heard and saw Ruzek shout into his receiver.

"Halstead, you okay?"

"I'm fine, I think I broke my shoulder, but you gotta help me get Lindsay out man. The other car…"

"Jay, we called the fire department already, her side of the car is jammed up and against the other car. We can't move her out ourselves. Just stay put. Is your shoulder okay?"

"Yeah." He reached across his chest with his right hand and covered his shoulder and stayed that way.

Jay closed his eyes for a few moments as he heard his team working on his getting his partner to respond. Olinsky kept talking to Jay but Jay tuned him out until he could hear the sirens again.

"They're here." The sirens blared again and the lights came into view. The gas was cut off, the doors of the giant trucks opened.

"Guys, we've got Halstead and Lindsay stuck in here. Halstead's okay, possible broken shoulder and kind of out of it but Lindsay's unconscious."

Severide sped up upon hearing Lindsay's name, jumping out of his seat and hurrying to the two vehicles, shouting out orders behind him.

There was a frenzy around Jay as equipment was being lifted. The firefighters were loud, but he could barely hear them over the adrenaline, the pain in his shoulder and the state of his partner. There were unisons of "one, two three!"s and the sound of metal screeching.

He watched Herrmann pinch the door with a giant metal clamp until the door came off and he watched Severide pull Erin out and onto the backboard and Dawson and the new paramedic, Sylvia, carried her away. Herrmann returned with a stretcher and two extra paramedics, and helped him out of his side of the vehicle.

"I don't need the stretcher. Just-just get her the help she needs first. Please. Quickly." His legs were shaking but they would be fine. He leaned against Ruzek for support, and him and Atwater helped him to their undamaged car.

"We'll take him to the hospital. Go with her first." Olinsky said, getting into the driver's side of his car. The second ambulance took off with the driver of the other vehicle. Unfortunately, over the radio, the detectives were able to hear the medics announce that the teenage driver had been dead on the scene. Killed instantaneously.

"Let's go to Lakeshore to check out your shoulder. Are you hurt anywhere else?"

"No." He felt like his entire body was coming apart, every limb felt sore but he still stuck with his answer. "No, I'm fine. Just my shoulder." The door closed and the engine ignited and they sped off. "Erin...she was-she was breathing?"

"Shallow, but yes, breathing. A couple of broken ribs, they'd said. They think she'd suffered from a hit to her head, that's why she was unconscious."

"Did they say how bad it is?"

"We'll find out when we get there." Alvin glanced at him through the rearview mirror, and Jay caught the glance.

"Just-just focus on the road." He mumbled under his breath, watching his colleague speed every red light possible until they pulled over at the driveway of Lakeshore Hospital.

A/N 2: Hello guys, this time it's Bubbly! Yay! Lets do a wave! Woo hoo!

Anyways, I know that this isn't typically what I dip my feet into, but hopefully you guys will hang around and wait for some pretty bad ass stuff to happen. I am so excited about how this story will turn out (yes, we are deep into chapter 4, but we aren't done yet) and it has been such a confusing blast working with not only the wonderful and amazingly talented writer that is Belle, but also working with, and getting to know such a wonderful person that I am so pumped to call our Beta.

And for the record, yes, I had Belle working on this at four in the morning because I was so excited. I know, I'm rude.

Anyways, that's going to be a wrap for tonight. Please, please, please, don't be afraid to leave us a review, follow, favorite and/or PM. We graciously love and accept them all!

See ya when I see ya!