Gabby had been pacing the halls of 51 for a while, back and forth, while everyone slept. So much was on her mind, the tossing and turning not helping her cause. Her and Casey's relationship had gotten hard, harder than she had imagined it would. She knew he was right, but giving him that satisfaction and control wasn't part of who she was even though she knew she could lose this job.

"Gabby, it's two in the morning," Matt mentioned, leaning in the doorway of his quarters. She nodded, well aware of the time, but continued to pace the space in front of him. It worried him, despite their problems. Just because things were rough, didn't mean he didn't know her or love her, and he knew this wasn't like her. He'd never seen her like this. He reached out, grabbing her wrist gently and pulling her into his quarters. "What's going on?" he asked, shutting the door, then sitting down on the bed.

"It's hard, Matt. We can't show us here, and we don't talk at home about anything," she told him, biting her nails in the process. "You say I don't respect you, but I do. It's just difficult remembering that here, you're my lieutenant first. But you seem to forget that at home, you're my fiance first. There are days where I want to talk about the shit day I had at work with my fiance, but the lieutenant is there first." She sighed softly, looking at him.

"You're right, Gabby. We're both having a hard time, but I have to be hard on you here, and my opinion about the decisions I make to keep you safe aren't going to change just because we're home. I can't let myself question them." He looked at her, and sighed. He knew they were two sides of the same coin. "Come to bed, try to get some sleep," he told her, holding her hand in his and guiding her over. They laid down, Gabby curling into Casey's chest. It wasn't long before the alarm went off.

"Ambulance 61, Truck 81, Squad 3, Engine 51, Battalion 25. Apartment fire Russell and Main." Gabby and Matt looked at each other with a sigh, getting up and jogging to the truck.

"Just love these early morning calls," Hermann yawned as they all pulled on their jackets and hats. The fire was less than a mile away, but when they got there it seemed like it had taken longer. The entire building was engulfed.

They all got out, waiting for orders. "Casey, take the top two floors, Severide, bottom two," Boden told them. They nodded in agreement, turning to their teams.

"Otis, Mouch, vent the roof. Hermann and Cruz, third floor. Dawson, you're with me," he told them. They all nodded, pulling on their breathing apparatuses as they rushed into the building. Casey could tell this was bad, the flames rolling on the ceiling already. He and Gabby made their way up the stairs to the top floor.

"You check that side, I'll check this side," he told her, motioning for her to go left. She nodded, breaking down the doors, but finding nobody. Casey, the same. "Let's head out," he told her after their search, heading down the stairs with her behind him. It felt like time stood still as they reached the third floor platform. The heat was fine through the protective gear, yet the flames still licked at their flesh though they didn't seem to feel it.

Gabby was the only one to hear the creak of the building as Boden called for them to evacuate, the smoke rolling black. She looked up in time to see the beginnings of a structural collapse, shoving Casey from behind. He didn't know what was going on until he looked behind him, a hole in the floor and in the ceiling where Gabby should have been. He was stunned for a moment, not quite registering what had happened. When the PASS alarm sounded below him was when it hit him, running down the stairs to the ground floor.

"Mayday! Mayday! Firefighter down!" he called. He knew he had to move her since there was risk of a flashover or more structural collapse. He knew he had no time to get a backboard, which meant he was risking everything to only hope that she was okay. He moved the debris off of her, grabbing her in his arms and carrying her out of the building.

When Hermann looked up, he couldn't believe what he was seeing. It wasn't a sight that they had seen before. Casey was running out, carrying Dawson out of the flames bridal style. He could tell that something wasn't right as he laid her on the stretcher, stripping the apparatus off of both her and himself. Mills and Brett rushing to her side. They all knew it was bad, falling two stories with a third falling on you.

"Casey," Mills said gently, as they got to the ambulance. He shook his head.

"I'm going with you," he almost growled, getting in the ambulance, Mills following. Casey sat out of Mills' way as he got an oxygen mask on Gabby and an IV in her arm. The heart monitor showed a very weak pulse. All Casey could do was mumble, "Come on baby, you'll be fine."