Da Vinci must defuse an impending war between the city's most powerful unions when the Police suggest that a Fire Department inspection notice tipped off a grow operator to an impending raid, causing an officer's death. Leary's investigation of a pedophile ring leads to a prominent developer and an old nemesis.

Da Vinci is confronted with the prospect of an all-out union war when a police investigation determines that Fire and Rescue may have contributed to an officer's death. Berger and Rita scramble to line up support for the crucial slots vote. The pedophile case is complicated by the involvement of Brian Curtis and the keen interest of Chief Jacobs.