
Self-made millionaire Jonathan and freelance writer Jennifer are the Harts - a globetrotting married couple with a talent for finding mysteries wherever they go. And even when they're uncovering thefts, espionage and assorted skullduggery, they still find time for romance.
Jennifer's father (Ray Milland) believes that a beautiful woman (Samantha Eggar) is Jennifer's sister, but Jonathan is not so sure.
A greedy relative of a deceased Scottish chieftain battles to succeed the late clan leader but must compete with Jennifer for the title.
Freeway's wolfing of dog food for a commercial makes his masters question the ingredients.
Jonathan and Jennifer hide in a convent after she witnesses a gangland murder, but the killer finds them.