Neil Agar (William Smith), a special agent with the State Department's Office of Security, is dispatched to investigate the death of a bacteriologist working at government-sponsored Brandt Research. Quickly making the acquaintance of the laboratory's head librarian, Julie Zorn (Victoria Vetri), he begins interviewing the firm's leading scientists, many of whom have reputations as sexual players. His investigation is soon complicated by Dr. Susan Harris (Anitra Ford), a beautiful entomologist working on bees, and the growing number of deaths, all men who died of congestive heart failure caused by sexual exhaustion.