Wealthy Jonathan Hart with the aid of wife Jennifer probe a friend's accidental death, a verdict that does not convince the widow.

While vacationing on their yacht in Mexico, the Harts answer a friend's call for help and find themselves jailed for drug dealing.

Introducing himself as Jonathan Hart Jr., a boy charms the Harts and Max as part of an elaborate hoax.

The purchase of an antique car plunges the Harts into international espionage.

A disturbed employee working at Hart industries becomes obsessed with her boss, Jonathan. She mimics Jennifer's appearance and plots to kill her.

Jonathan and Jennifer try to prove the innocence of friends implicated in a noted divorce lawyer's murder.