This is coming right after the end of season 3. Gabriela Dawson was at Matthew Casey's home to tell him something. When she knocked on the door, it was opened. On entering the apartment, she walked slowly into the main room yelling his name. Arriving in the kitchen, she saw Katya's lifeless body.

Gabby was terrorized by what she saw. A woman was lying there, in the kitchen of Casey's apartment. She approached to determine if she was dead. And that was the case. She pulled out her phone et called her brother.

« Hey sis, what's up ?

-You have to come to Matt's apartment. One of the girls is dead.

-I'll be there in five minutes. And Casey ?

-I have checked the main room and the kitchen. May I check the other room ?

-You can but don't touch anything, understood ?

-Yeah ».

She had to make sure that Matt was here or not. She hung up and handed her phone in the pocket. She inspected the other rooms one by one. The bedroom? Nobody. Severide's bedroom? Still no trace of him. A single, last piece to check: the bathroom. In reaching it, she tried to push the door, but something was blocking it. Her anxiety grew, she felt her heart beating faster and lowder in her chest. She had to force the door a little bit.

« Oh my god! »

Her blood run cold. There was blood almost everywhere: on the walls, on the floor, everywhere. And in the middle of this chaos, the unthinkable: Matt's body.

« Matt! »

She rushed at him to see if he was alive. He was cold and pale. Her hands were shaking but despite this, she put her fingers on his carotid and one of her hand on his chest.

One... Two... Three... Four... Five... Oh god... Only thirty beats per minute?

His pulse was weak and he was not breathing. She immediately took her phone again and called 911.

« I... I need an ambulance as quickly as possible to lieutenant Matthew Casey's apartment! He is seriously wounded! »

She didn't hung up. No time. She left her phone reach the floor and got down to Casey. She had to keep his heartbeat and his breathing still by performins CPR. She was crying.

« Please Matt, stay with me! Don't give up! »

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At Molly's, everyone was still partying. Severide rose from the bar.

« What ? You're leaving already ? But you just drank a beer !

-I know Hermann but I'm exhausted. Tough shift you know.

-Fair enough. Rest well Severide.

-You too Hermann ».

He went back to his car, and began to take the road to the apartment.

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The five minutes before she heard the sirens of an ambulance and the police seemed an eternity. She was almost out of breath but she didn't care. The most important was to keep Matt alive.

« Come on... »

The door opened slowly.

« Gabby ? »

Antonio took his gun and entered the apartment.

« Gabby, you are in ? »

Gabby didn't have reacted.

« Come on Matt, hang on, please ! »

Antonio and the paramedics who were following him moved toward the voice they heard.

« Oh god, Gabby, Matt ! »

Gabby recognized Chout's voice. But she continued her work. He approached her and Casey soon as possible, knocking Antonio in the same time.

« I'm... Fine, but... Matt... He was wounded in the chest... Weak pulse... No breathing... I think all the blood is to him... More than ten minutes... Try to keep his heartbeat... ».

As she spoke, Chout tried to intubate Casey.

« I can't intubate him. His jaw is broken.

-Do a tracheo then.

-I... I don't know how to do this...

-Switch with me on three. One, two, three ».

They switched their place and Gabby grabbed a sclapel to do an incision on his neck. Then she passed an ET tube in the trachea and the other paramedic began to pump air in his lungs. She grabbed a stetoscope and Chout stopped compressions.

« It's in, but he had both punctured lungs ».

Without hesitation, Chout grabbed two syringes and planted them one after another into Casey's chest. Gabby sighed with relief when two air squeaks were heard. After that, they inspected his body in order to find other injuries.

« He has broken ribs, serious cuts on his leg and on his forehead. Possible head trauma ».

He took his penlight and opened Casey's eyes.

« Pupils are equal but not reactive. Must bleed in his brain ».

Gabby placed patches to monitor his vitals.

« He's bradycardic ».

Gabby began again CPR to maintain his heartrate to a stable level, paying attention to the two syringes.

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Approaching the house, Severide saw the flashing lights of an ambulance.

What the hell ?

He parked, get out of his car, closed the door and ran up to the apartment. The door was wide open.

« Matt ? What's happening ? »

Antonio was there. He prevented him from going further.

« Severide, you can't enter.

-Antonio please, I have to. Please I... I have to ».

Antonio sighed and after thirty seconds, he let him go inside.

« Bathroom ».

He went directly to the place that has indicated Gabby's brother. Upon reaching the door, he didn't expect what he saw.

« Oh... My god... ».

Blood... Bood Everywhere... Gabby... Chout... A paramedic he didn't know... And among all these hands, Matt.

« Matt ! »

Chout was preparing an IV on Matt, while Gabby continued compressions and the EMT named McGan continued to bag him.

« Severide, go get a gurney. He needs to go to the hospital quickly ».

But he didn't move. He was totaly paralized.

« Severide ! Gurney ! Now ! Hurry ! »

Severide shook his head and looked Chout. He ran as fast as he could to the ambo for the gurney and wth the help of Antonio, they went into the bathroom.

« Immediately put on the gurney, you keep compressions on him okay ?

Gabby could only nod.

« On three. One, two, three ! »

They began to lift him.

« Oh stop ! »

They rested.

« His basin seems fractured, and it's not stable.

-What do we do ?

-Severide, slip the stretcher under Matt while we put him on his right side. And then, we lift him ».

Everyone obeyed.

« We're good. We take him immediately to Chicago Med.

-I'll stay here. This is a crime scene and I can't leave it like that. Keep me informed sis ?

-We'll do Antonio. Don't worry.

-Thank you Kelly ».

He ran to the back of the ambulance and pulled out his phone to text Boden : everyone in Chicago Med. Matt is seriously injured.

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At Molly's, people began to leave. Only stayed the guys of 51. Everyone laughed. Boden felt his phone buzz.

Donna is wondering where I am !

He grabbed his phone.

Severide ? He forgot something at the bar ?

Then he began to read the text and his face turned white. Hermann, who looked at him, was worried.

« What is it chief ? »

Everyone stopped laughing and turned to thier chief.

« It's Severide. He asks to join him in Chicago Med. It's Casey ».

Without another word and fast, everyone left the bar and ran toward the cars. Hermann closed the bar and did the same.

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« Gabby... We have to put pressure on the wound while performing CPR ».

Chout held a big gauze to Gabby, who took it with one hand and put it on the wound, continuing her work. She was scheduled for one thing now : save her love, the father of her unborn baby. Chout made another way and prepared several bags of blood that was at his disposal. Fortunately, the apartment isn't far from the hospital.

« We're losing him ! »