Blake arrives at the scene of the accident and rescues his aunt. Medics arrive, and he accompanies her to the hospital.

The other team members talk about his situation.

Gallo arrives for work and meets Carver, who notices that Gallo is blaming himself and offers some advice.

Dylan arrives at the firehouse and reveals that he is leaving Chicago for Vegas for a few days and wants her to fill in for his magic act.

The team responds to a fire emergency in a building; without their knowledge, the house has chemicals that burn them on igniting. Carver goes for a victim who knocks off his mask, exposing him to the chemicals.

He manages to pull her out but collapses. He is rushed to Med, and Galo checks in on his aunt there.

The doctor tells Gallo that his aunt is concerned about her sobriety and wants to avoid using pain meds. The doctor suggests Gallo give her the meds himself.

Boden follows on the chemical incident. He learns that a politician named Don is associated with the building and its violations.

Sylvie practices for her magic show but runs into multiple problems.

Boden informs the team about Don, and Ritter reveals his altercation with Don when Don is cheating.

Ritter, Boden, Stella, and Herrmann follow up on some leads to take down Don for good.

A colleague warns Boden against pursuing the case.

Much shows Sylvie some tricks.

Gallo prepares to take in his aunt and help her through recovery.

Don approaches Boden in a restaurant and offers to bribe him with no certain terms. Boden turns him down.

The team checks his campaign donations list to link him to some building companies and prove he was corrupt.

Herrmann Ritter check out one building and run into Don's mistress. They hurry out.

Don makes his play and ambushes Boden by calling him into a meeting where he changes the narrative to make himself look good.

Blake goes to the hospital to find his aunt had left after being discharged.

Boden watches on TV as Don takes the win as one of his.

Gallo's aunt arrives at his door with groceries. Gallo hugs her.