Starsky and Hutch investigate the murder of a beautiful ex-policewoman who left the force to become a go-go dancer in a sleazy dive after ending a romance with Starsky in "Lady Blue." Three months after breaking up with Starsky and supposedly leaving the police force, Helen Davisson is found dead, the victim of an obviously disturbed murderer. Investigation, indicates that Helen had turned to booze and low company in a joint where she worked. But word comes down from the Chief of Police that officer Davisson was working undercover to gather evidence against a brutal gang of jewel thieves. Similar successive murders indicate, that a psychopath is on the rampage against cocktail waitresses.