To find an arsonist, Baretta seeks the help of a former investigator who retired after suffering both physical and psychological damage in a fire.

While Baretta is investigating a series of waterfront killings, his cover becomes in danger of being blown by a waitress who knows him and thinks he's responsible for the death of her boyfriend.

Persuaded by the grandson of a retired cop who had supposedly been killed in a fall to reopen the case, Baretta discovers a judge on the take.