A murder at the red light zone prompts calls for its closure and a lawsuit against the city. When the Complaint Commissioner is frustrated by a lack of cooperation from the police, Da Vinci starts gathering evidence against Chief Jacobs. Zack and Friedland confront one another over their mutual deceptions. The high school girl implicated in the gay-bashing death blames two adult men for the crime.

When the grow-op shooting inquiry returns an inconclusive verdict, the firemen wage a protest. Da Vinci himself is investigated by the Solicitor General. Pedophile suspect Dubreau is tipped off to his impending arrest, prompting Leary to raid the Century Club. Manning confronts Da Vinci with proof that a competitor bribed a City Councillor to win an ad contract.

A crisis looms at City Hall when the police and fire unions unite against cross-training, and investigators search the Mayor's offices for evidence that Da Vinci over-stepped his authority in his dealings with Chief Jacobs. Klotchko maneuvers to cover his tracks in the grow-op shooting. Brian Curtis encourages the witnesses testifying against Dubreau to leave the country.