
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.

At their mountain retreat, the Harts aid an innocent caretaker framed for murder by a local sheriff.

On a train trip, the Harts investigate an undercover police officer's death; guest Carol Lynley.

Jonathan fears for Jennifer after the murders of friends who, like her, posed for a fake-fur ad.

Jonathan's look-alike and his magician brother (Harry Blackstone) plan to kill Jonathan and run Hart Industries.