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.

To infiltrate a gang of jewel robbers, Baretta seeks the help of a former expert safecracker he once sent to prison.

When a dying hoodlum entrusts his girlfriend with a detailed record of all his underworld activities, she is sought by both the police and his former cronies seeking to protect themselves.