Teresa Colvin, the city's first female superintendent, petitions for a corruption task force to investigate an entrepreneur-turned-politician; Colvin's ex-partner, Jarek, investigates a suspicious murder with his new partner, Caleb.

Alderman Gibbons visits the family of a fallen police officer; Jarek and Caleb follow up on Liam's leads; Vonda and Isaac are promoted to the organised-crime task force.

Jarek and Caleb track a bank robber through the streets, but he is dead by the time they catch up with him; Superintendent Colvin meets with Alderman Gibbons about a construction site.

When a bomber blows up a city building, additional targets and people are left in danger; a teenage armed robber threatens Alderman Gibbons.

Detective Wysocki and Evers encounter uncooperative locals while investigating the death of a teenager in Chinatown; Teresa's brother-in-law gets involved with a shady business deal; Liam goes deeper under cover.

While searching for a drug supplier, Wysocki and Evers uncover an elaborate murder case; Teresa tries to get new radios for the department.