Violet wakes up to noise in the morning coming from Carver's construction work.

As he heads for work in the morning, Gallo sees a mysterious woman looking at him with a smile on his face.

Chief Boden informs Stella that she was selected to participate in a special homeland security task force. She is supposed to meet with a liaison.

Capp reveals that Tony is on track to break the CFD consecutive shifts streak. He and Mouch vow to keep him safe until he breaks it.

Stella meets the liaison who is Casey. Casey catches up with everyone else. Violet and Sylive walk in, and they are surprised to see him.

Herrmann invites everyone to Cindy's party.

Casey and Violet talk, and she reveals that she has been seeing someone. Casey says he, too, has been seeing someone.

Ritter notices that something is off with Gallo as he seems so quiet.

Truck and Squad respond to an emergency where a man disturbed a hive leaving Engine behind.

The woman from earlier shows up at the station and asks about Gallo. Ritter tells him about her, and he says she's her aunt, who was looking to reconnect.

In the special conference, Casey reveals that there are credible terror threats, and Chicago was suspected to be a target. He wanted was creating a first responder network liaison in case of an attack.

Blake sees his aunt, and she tries to explain why she left him all those years ago after the fire that claimed the rest of his immediate family. She gives him the keys to an old family storage unit.

Casey reveals that he lied about being in a relationship.

Gallo goes to see the stuff in the storage unit, and they bring back old memories.

Tony develops food poisoning from something he ate.

Chief Boden asks Casey when he is coming back.

Truck responds to an emergency where a man is hanging off a high-rise building. Gallo and Casey save him.

Carver talks to Gallo about his family. He advises him to give his aunt a chance.

Tony makes it through the shift.

Violet asks for Carver's help to install something.

Everyone attends Cindy's party. Violet says goodbye to Casey.

Gallo goes to see his aunt and finds she's been in a car crash.