A man drives his car off a cliff in an apparent suicide. One insurance investigator is not so sure it was an accident or suicide and gets 48 hours to prove his case.

During the eighteenth century the Empress of Russia sends her lover to kidnap her rival for the throne.

An ex-American GI returns to Italy to find some money he stashed before doing a prison term. He discovers his cash is now gone and quickly sets off on a manhunt to find out who stole his buried fortune.

A husband-and-wife detective team look into the murder of one of her friends, whose father--a prominent scientist--has been kidnapped. They find themselves up against a sinister crime organization headed by a mysterious figure known only as "Z".