A part-time referee is found murdered, and Detectives Ed Green and Cyrus Lupo investigate the victim's gambling habits. The detectives are led to notorious hustler, "Bunny," a familiar face from Detective Green's past. When ""Bunny" is found dead, Detective Lupo is called to the scene and discovers his partner, Detective Green, is the shooter which causes confusion in the department and disbelief in the DA's office. The case is turned over to internal affairs Detective Kevin Bernard and Sergeant Gregory Cole, leaving Detective Green to face his dark past and in danger of losing his badge.