Reluctant New York City private eye P.J. Detweiler is hired as a bodyguard to protect Maureen Preble, the mistress of shady millionaire William Orbison. In truth, Orbison plans a deadly intrigue in which P.J. is to play a central part. Meanwhile, complications ensue as P.J. gradually falls in love with Maureen.

Little coastal town is being terrorized by deadly Barracudas.

Dr. Bill Cortner and his fiancée, Jan Compton, are driving to his lab when they get into a horrible car accident. Compton is decapitated. But Cortner is not fazed by this seemingly insurmountable hurdle. His expertise is in transplants, and he is excited to perform the first head transplant. Keeping Compton's head alive in his lab, Cortner plans the groundbreaking yet unorthodox surgery. First, however, he needs a body.