Warning: The story contains spoilers for season 3, 2 and 1

Disclaimer: I do not own any of the characters or the plot of Chicago Fire and Chicago PD. I do not own the lyrics of the songs used. I do not own the text taken directly from the show. This story is intended for fun only and I am not making any money with it!

Chapter 14

"Kelly, you've - " Erin's voice died out when she returned into the empty bullpen, expecting to find Kelly there. Murmuring a curse, she grabbed her mobile and dialed Voight, a part of her believing that Severide had gone downstairs where the pickup was…Hank hadn't seen the Squad Lieutenant in the past nine hours.

When she turned angrily to face her desk, her eyes fell on the cell phone laying on top of it. Scared of what she'd see, she unlocked it, nearly dropping the phone when two photos appeared on the screen…the same two photos that had pushed Severide over the edge…

When her phone rang in her pocket, she suddenly remembered to breathe, releasing the breath she had been holding for the past few seconds. Placing Kelly's phone on her desk, she took the call, expecting to hear Jay's or Voight's voices…

"What?!" She snapped, too worried to care how loud or rude her voice sounded.

"Detective Lindsay, it's Doctor Shaw again."

Erin sighed, dealing with the shrink being the least of her problems, but the Doctor had a very different opinion. "Yes."

"Did you find Lieutenant Severide? I'm worried - "

"Yeah…here's not here right now."

"Listen, I have a feeling something's going on. But as I've already told the Lieutenant, there's a court order and he must come and see me."

"He will." Erin knew it was a lie…a lie to cover Kelly's ass for a bit, to give her time to end the nightmare and find the people missing.

"I'm calling you because I wanna help him, not throw him in jail. You're the police and I know you can keep it off the books. Talk to him and get him to my office by the end of tomorrow, or I'll have to report that he vanished in the middle of our session…you know better than me what's going to happen next!"

"Thanks." Lindsay uttered before ending the call, grateful to the Doctor for giving Kelly a chance to do the right thing, before getting the court and the police involved. What Severide did not need in that moment was a court order for his arrest…

Xxx

Without a car, it took Kelly about an hour to get to Fifty-One. He had left his keys, together with his jacket, at Doctor Shaw's office, and was not intending to ever getting back there. But he was beyond grateful that he had his wallet in his jeans' pocket. Severide had stopped by the first ATM on his way, withdrawing a part of the not so big sum of money he had left, just in case….

His next stop was the firehouse. He was hoping that Boden had requested other companies to cover their shift, but he was wrong...He let out an annoyed snort, but walked closer to the trucks, relieved there weren't people there.

Kelly stepped inside the empty kitchen, already sure that everybody was in the briefing room, and quickly made his way to the bunk area and into his small, dark office. He closed the blinds, trying to focus, realizing that could be the last time he was at the firehouse he called home.

Squad's Lieutenant opened the bottom drawer of his desk, took out all the documents and old paperwork he had crammed in there, finally getting to the set of keys underneath, the keys for his car…Shay had left the spare keys in his quarters…

Next to the keys lay his CFD badge…He moved his fingers on top of it, feeling the cold metal, and squeezed it, not releasing his grip for a few seconds…Kelly placed it carefully on top of his desk before heading for the door and toward his locker. He looked around to make sure he was alone and unlocked it, then dumped two t-shirts on the floor and uncovered a small box, containing something he had never held in his hand before…he had gotten it legally, but it was going to be used for wrong purposes…he had left the small gun in there after the incident with Vince Keeler, never intending to use it, but times had changed…Kelly reached out to grab the box, but heard footsteps, Brett's and Mills' voices sounding from the hallway.

"Damn!" He muttered, covering the box with his uniform and leaving it inside. He slammed the door shut, not having time to lock it and headed for the exit, making it all the way to the back door, but his way was blocked by a man with a serious expression on his face.

"What are you doing, Severide?" Boden barked, his concern growing after he took a good look at his Lieutenant, sure he was up to something.

Kelly's face twisted in a grimace and he took a step backward in an attempt to escape Chief's scrutinizing look. "Came to get something." In his desperation to not waste any more time, he tried shoving past Boden, but Chief stopped him again, staring at those tormented, glassy blue eyes.

"What?"

"Personal business, Chief."

"Kelly - " Chief reached out to rest his hand on Severide's shoulder, but the Lieutenant took another step backward, avoiding the touch. Boden gritted his teeth. "I know how you feel right now, but - "

"With all due respect Chief, you don't!...And I hope you never do!"

Boden snorted, shaking his head. "Come on, let's go to my office." Chief pleaded with a soft whisper, his Lieutenant's behavior frightening the older man. "Detective Lindsay mentioned you were staying with her - "

"I can't just sit and watch!"

"It's the best we can do right now!"

"We'll see…"

Chief reached out again, this time grabbing Kelly's arm with the intention of pulling him back inside the firehouse and calling Erin to check what was going on. He didn't expect for the Lieutenant to fight the strong grip, like a restrained animal. Severide's weak, tired body did not have the energy to win and he stopped protesting, looking at Chief with pleading eyes, eyes begging him to let him go and find his brother…

Boden was ready to rip someone apart when the overhead alarm sounded, calling the entire firehouse to a multiple-vehicle collision. He had no other choice, but to let Kelly go, spending the next five second staring at the figure of the Lieutenant who headed down the street…Chief ran to his car, pulling out his phone and called Lindsay, hoping that she'd be able to find Kelly and stop him.

Xxx

Hadley walked into the apartment they were holding Logan at, Spellman having just started his second glass of vodka for the day, his body resting on the expensive couch. He put the glass down and glanced at Kevin, brows arched.

"Done?" Spellman growled, not able to stop himself from grabbing the vodka and taking another sip. Hadley did not respond. Instead, he stepped closer to the coffee table and hit the bottle with his open palm, Spellman watching in distress as it rolled under the couch.

"Need you sober!" Kevin hissed, turning to look at Spellman. "Get your ass off the couch!"

Spellman was many things, but stupid wasn't one of them. He could tell when Hadley was pissed off, and frankly said, he was afraid of the ex-Squad member…not for his own life, but because Kevin knew where to find his daughters…and had threatened to go after them if anything went wrong with his perfect plan…

Spellman got up, staring at Hadley. "Logan's petrified."

"Good…his face is what Severide and his dad would see in the end."

"C'mon…he's a kid!"

"Just like your kids, right?!" Kevin snarled before glancing at his watch.

Spellman cursed silently, not daring to say anything out loudly.

"Officer Finch said Severide's stormed out the district pretty desperate after the last pictures I sent him." A smug appeared on Hadley's face, a smug showing how proud he was with himself and his idea. "I know him well…he's gonna try to save his buddy."

"He might check the building - "

"Yes…it's gonna click eventually."

"So?"

"So when Fifty-One returns from the scene they are at right now, officer Finch's gonna call me…you know what to do here. Then I'm gonna take care of Casey…when they arrive here, I'm gonna set the building on fire…I've got the cameras ready…a lot of firefighters are gonna die today."

"And Severide?"

"I hope he lives…want him to see the destruction…feel the pain. He'll beg us to stop and take his life…"

Xxx

Casey fought the invisible demons holding him into the darkness, finally winning the battle and opening his eyes, the simple action sending an enormous amount of pain through his entire body, his head as if ready to explode. His eyelids felt heavy, too heavy for his exhausted body, and he let them drop…he had no idea how long he had been there, how long he had been out, minutes, hours, days…

Every breath hurt, but Matt tried to focus, his lungs getting some of the air needed…his skin was burning from the brake fluid that had been poured on him, something he did not remember clearly…but when the strong smell of chlorine powder hit him, he forced his eyes open once again, this time taking a good look at the room and his surroundings…he knew the place…the same place where he had watched a friend die…the same building that had taken Shay's life and changed theirs forever…his throat was so dry and sore that he could not even curse…It wasn't until he tried to move his hands, tied behind his back and around a pipe, that he felt that something was attached to the thick rope…

"It's brake fluid." A voice sounded from the entrance of the room and Hadley stepped in, experiencing the joy from seeing Matt so weak, so broken. "You keep moving, we both burn to death."

Casey froze, finally realizing that it wasn't water on his hair and clothes, but the liquid that combined with Chlorine powder could produce deadly gas and result in a fire…and there was plenty of both compounds needed to blow the place up.

"W…why?" Matt managed to ask weakly…he felt as if some on the brake fluid had made into his mouth, and he wasn't wrong.

"It's fun." Kevin shrugged his shoulder. "You see, there are three different ropes around you, tied together…each one's holding a bottle upright…you pull the wrong one in the wrong moment and boom."

Casey opened his mouth and closed it almost immediately, choking on the words that didn't make it out…he was coughing violently, trying not to move, trusting Hadley to be telling the truth…the place was a trap and his movements could blow it up.

"When your friends come to save you, they'd have to free you. First, they'd have to fight some fires, second, they'd have to untie you without letting a drop of the brake fluid touch the small pile of chlorine behind you…or you all die."

Kevin's smile spread across his entire face and he switched the camera he was holding on. "Say hello to Lieutenant Severide…I promise you he'll get the chance to see it."

Xxx

Kelly watched impatiently as Lindsay got into her car and drove away, having been to Casey's apartment in search of Severide…no, that was his battle…he was determined to end it, without dragging anybody else into it…he couldn't ruin her life, too, she meant too much to him.

When Erin made a turn and disappeared behind the corner, Squad's Lieutenant walked to his car, used the spare key he had gotten from the firehouse and headed in the direction of Spellman's house…PD had searched the house before Hadley's trial, looking for evidence…it was different now…Kelly didn't need evidence…he needed to know where to find his friend.

Severide drove to the house on autopilot, his mind not being there, the last images of Matt and Logan he had seen flashing before his eyes. He pulled over a couple of blocks away from the house, not wanting his car to attract attention, just in case PD or Spellman showed up. He opened the trunk, grabbed a halligan and walked to the back of the house. Kelly tried the door, but it was locked, so he did the only sensible thing – broke the kitchen window and climbed through it.

He moved to the living room, his eyes darting between the four walls, stopping at a familiar hat, laying on top of a rucksack…Hadley's…he had seen them so many times. Severide knelt on the floor, the smell of alcohol coming from the couch making him sick, and unzipped the rucksack…

"Son of a bitch!" He muttered, his hand landing on a bunch of photos of Casey's old apartment, the one he had once been sharing with Hallie. Digging inside, he found papers containing information about the people currently living there and their trip to Europe…an apartment…they were holding Logan in a damn apartment. In his desperation to find anything that would point out to Matt, Kelly emptied the entire rucksack, but found only clothes.

Battling his inner demons and fears, he left, getting into his car, the drive to the apartment building where Casey had used to live taking him only ten minutes…he was grateful he knew that area of the city well as his mind was anywhere but in the car…

Kelly grabbed the halligan and ran into the building, climbed the stairs and knocked on the door twice.

"You forgot some - " Spellman's voice died out when he came face to face with the Squad's Lieutenant. The ex-firefighter tried pushing the door closed, Kelly using his right leg to stop it. Severide walked inside, Spellman making a couple of steps backward, too stunned to hide how surprised he was…Hadley's plan had just gone to hell.

"Where are they?" Kelly growled, the rush of adrenalin making him unable to focus on anything else but the face he hated so much, his eyes not spotting the chlorine powder on the floor and the opened bottles of brake fluid on the table behind Spellman.

"You talking about Casey?" Spellman grinned, taking another step back until the back of his knee came in contact with the coffee table.

"WHERE?" Kelly yelled, closing the distance between him and the ex-firefighter. He opened his mouth to ask the same thing one more time, but a child's cry caught his attention. He recognized Logan's terrified voice, begging for help, coming from the master bedroom.

"It's a shame the boy has to suffer because of you." Spellman offered a sarcastic head shake, his eyes daring Kelly to use the halligan.

"WHERE'S CASEY?" Severide yelled, spitting on the other man's face.

Spellman wasn't intimidated…no, he was simply enjoying the moment. "Sent him on a trip…to visit Shay."

The next thing Spellman felt was a heavy body landing on top of his, both men ending on the coffee table, knocking the bottles of brake fluid over. The poisonous gas produced from mixing chlorine with the liquid reached Kelly's throat and lungs in seconds, breathing becoming extremely painful for both men. Ignoring the irritation in his eyes, Severide lifted the hand holding the halligan, but Spellman pushed him off, grabbing his hand and gaining control over the tool. Severide relied on his back's muscles to lift the upper part of his body with the intention of using his head to hit Spellman's, but the later was quicker, elbowing the Squad's Lieutenant just above his left temple. The pain was too strong for Kelly to keep control over his body and the back of his head connected with the floor, Spellman sitting on top of him. Kelly could feel the heat produced from the chemical reaction, could hear the flames moving all the way to the walls, starting to consume the room, but he tried to focus his attention on the man holding him down…Logan's pleading voice getting louder, the boy now frantically calling out his dad.

"Say hello to your friends in hell, Lieutenant!" Spellman hissed, using his free hand to grab the bottle of vodka Hadley had taken away from him earlier and rendered Kelly unconscious…the poisonous gas was going to finish the job…

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Thank you all for reading, and thanks sooo much for reviewing to those of you I cannot pm, your support means a lot!

Sorry for not having much dialogue in this chapter, I promise the next one's gonna be better. But right now Kelly's alone out there, hope you liked the angst and his determination to bring Casey back, no matter what, without putting Erin's life and career in danger…I can't promise Erin's safe though *sigh*

Also, did you like concerned Chief and hurt Matt? Would love to hear your opinion so please review before you go Thanks!