Private eye P.J. is reluctant when he gets a new job: he shall protect Maureen Preble, mistress of millionaire Orbeson, mainly from attacks by his wife and her greedy family. In truth Orbeson plans a deadly intrigue in which P.J. is to play a central part. Meanwhile P.J. falls in love with Maureen and Orbeson's money.

Desperate for employment, New York private investigator P. J. Detweiler takes a position as bodyguard to Maureen Preble, mistress of wealthy William Orbison. After several attempts are made on Maureen's life, Orbison moves wife, mistress, relatives, and business associates to his small island in the Bahamas. There P. J., suspecting another attempt on Preble, slays Jason Grenoble, Orbison's business partner. Although jailed for the murder, P. J. is reprimanded and freed. Upon release the detective discovers his entourage departed and rightly suspects that Maureen and Orbison have engineered Grenoble's death. Back in Manhattan, P. J. documents Orbison's motivations and confronts the magnate with proof of his crime. During the encounter Maureen and Orbison shoot and kill one another, freeing P. J. for another assignment.