Ronnie and Harry grew up together in poverty and turned to a life of crime, joining a mob led by Mickey Donoghue. Harry gets arrested for drug possession and is given a choice to turn informant. He becomes a police informant, helping to bust the mob's operations. Mickey suspects there is a rat and tasks Ronnie and Harry to find them. Ronnie discovers Harry is wearing a wire, realizing he is the rat. Ronnie must now decide whether to side with the mob and help kill Harry, or give Harry a chance to explain and risk being killed himself for keeping the secret.