A\N: So here it is, my version of the Chicago Fire season finale. Hope you all like it.

Disclaimer: I do not own Chicago Fire, Chicago PD, NBC or Global

Spoilers: None

Warnings: None

Chapter 23

"Alright," The man handed Matt back the undercover phone, "You're fine."

Matt shook his head and looked at Jack and narrowed his eyes, "Unbelievable."

"Lets get Matt a drink!" He called over his shoulder.

"No, no," Matt shook his head, "I uh promised my fiancée I wouldn't drink until she could. She's still nursing our daughter."

"Fair enough," Jack let out a low chuckle, "Now my business partners are prepared to offer you cash upfront for your work and are willing to add in another 5 percent of you promise to keep it on the down-low. That means nobody can know what you're doing not even your fiancée."

"Yeah," Matt nodded, "Sure I guess," He scratched the back of his head.

"Good, be here on Wednesday at six," Jack told him, "I'll walk you out." He led him back through the club, "Matt," He looked at the other man, "Don't worry this is how this business works, especially in Chicago and I mean those guys are Eastern European everyone's a crock down there."

"Yeah I guess, just don't want anything to happen to me, I need to see my daughter and fiancée again."

"Yeah," Jack smiled, "Let me see that picture of them again."

"Sure," Matt loaded up his personal phone and showed Jack the pictures he had of Gabby and Ellie.

"Beautiful woman, beautiful daughter, you're a lucky man."

'Yeah," Matt nodded in agreement. "So I'll see you on Wednesday,"

"Yeah," He nodded and watched as Matt left sharing a subtle nod with Antonio who was still undercover.

As soon as he had gotten three blocks away from the club he got into the back of a van and was faced by an angry looking Voight, "We lost you!"

"Yeah and it's a good thing too!" He exclaimed angrier, "I had a gut feeling so I snuck into the washroom and flushed the wire. "It's a good thing I did because they checked the back of the phone and would have seen it!" He threw the phone against the wall of the truck, "What the hell Voight!"

"Hey, hey!" Jay glared at him but just then Antonio came in to the truck as well and looked at Matt, he was furious.

"You showed him a picture of Gabby and Ellie? You said he suspects something," Antonio shook his head, "They could go after them!" He clenched his fists, "You never do that!"

"Alright," Voight tried to remain the calm one, "Move them to a safe location with around the clock surveillance and do it quick! You", he turned to Matt, "You check into a hotel under a false name and stay out of trouble!"

"I'm going to see them!"

"Matt!" Antonio grabbed his arm, "I know its hard; You know how many times Laura and the kids have needed to go into protective custody but you can't see them."

"This is all your fault!" He pointed his finger at Voight,

"Blame me all you want, we'll keep them safe," He promised, "You know you can trust Antonio, you can trust my team too."

"Maybe," He shook his head, "But I need to see them!" He looked at Antonio, "Please, can you call them?"

Antonio knew it might be a risk, just in case they were on to him as well but he decided he'd be willing to give it a try as he knew what to say to Gabby.

"All right but you stay here," He got out of the van and walked into the street and pressed a speed dial number.

"Tonio," Gabby answered on the first ring, "Please have good news."

"Yeah its alright, El león rojo sabe. Ir a la cueva y esperar a que la amenaza de ser terminado."

"Antonio-" Gabby stopped; it all came back to her the code their father had taught them in case something like this ever happened. A name of an animal was always a sign for alert as it meant immediate danger and a cave or other forum of dwelling meant she and Ellie would be going into protective custody, She wanted to ask about Matt but she couldn't remember how to reply she just started crying.

"We're sending help," Antonio said and then regrettably hung up. His next call was of similar nature to Laura to tell her to be on alert for any vehicle or person following her or the kids.

Matt barely slept at all that night and the next day at the firehouse he Voight and Antonio briefly explained to him what had been going on.

"So you're telling me you went undercover," He looked at Matt, "Without telling me."

"Chief I know I should have but this Jack Nesbit guy gives a bad name to all firefighters. I helped and I want to bring him down, especially now!"

"We're almost there chief," Antonio promised, "We just need a few more days and we've moved Gabby and the baby to a safe location."

"Be careful," He warned.

"I'm going to need next shift off, if possible," Matt, told him.

"Yeah sure," He nodded and left to g back into the firehouse.

"I'll meet you in the car," Voight patted Antonio's shoulder and left.

"You keep them safe," Matt locked eyes with his future brother in-law. He knew though that Antonio loved Gabby and Ellie almost as much as he did and he'd die before he let anything happen to them.

"I will!" He promised and they hugged quickly.

From a safe distance a man sitting in a car saw the whole encounter and texted his boss telling him they were right about Matt Casey working with the CPD.

"Jack?" Matt walked into the club on Wednesday night, he was early but the club was deserted, he was getting an eerie feeling that didn't go away as he saw Jack Nesbit or the men he called his 'partners'

"I trusted you Matt," Jack seethed with anger, "Then you go the cops?"

"What?" He exclaimed, "I didn't go to the cops."

"Then explain this," He shoved a snapshot of him talking to Boden, Voight and Antonio.

"That's my boss," He pointed to Boden, "He wanted to talk to me about issues in house, "And that," He pointed to Antonio, "Is my fiancée's brother, he's a cop but he came to see me because I asked him to stop by. I never got the chance to propose to my girl properly with his and his father's blessing so I wanted to do it right. That's his boss," He pointed to Voight, "They were interviewing someone and then stopped by on the way back to their district. They just happened to come up to me just as Boden was talking to me. I did call my future brother in-law but not to talk about this!"

"Then why was he undercover with you?" He snarled.

"Because my fiancée found out what I was doing and got a little spooked and asked her brother to make sure I was alright. I didn't even know he was going to be here." He hoped his lies were convincing.

"Yeah," He laughed and thrust a gun into his chest we're going for a little ride," He motion for his men to handcuff him and gag him.

After using the secret knock Burgress entered the safe house and announced her presence, "Its just me Gabby!" She called out.

"Oh good," Gabby came racing into the main hallway.

She'd been feeling really sick lately and she'd felt like throwing up as she smelt pickles on Roman's sandwich half an hour ago. That's when it hit her; she and Matt had unprotected sex six weeks ago. She could be pregnant. They didn't use protection because neither one of them could have imagined this to happen. Ellie wasn't even two months old yet. No way she could be pregnant, but as she took the test the result didn't lie, it was positive. She didn't know whether to cry of happiness or sadness.

"Everything alright?" Burgrass asked as she walked out of the washroom tears visible in her eyes,

"Yeah, yeah," She lied, "I'm just going to check on Ellie," She went into the single bedroom and felt her heart drop, "ELLIE!" She shrieked as she saw the crib empty and the window open "HELP!"

"What?" Both Roman and Bugrass came in guns drawn.

"Ellie-" With a shaking finger Gabby pointed to the empty crib and then collapsed into the floor in tears. Her daughter was gone. Someone had kidnapped her daughter.

TBC

A\N 1: They took Ellie and what happened to Matt? Will they both be okay. And Gabby's pregnant how will that affect everything?

A\N 2: So since Chicago Fire isn't coming back until November :( I'm not sure when I'll start the season 4 version of this series, maybe in September as I'm already brainstorming ways to have it intertwined with my CPD one.