Living on the French Riviera, John Robie is a retired jewel thief who was once known as 'The Cat.' He catches the eye of Frances Stevens who is a pampered, vacationing heiress. But when a new rash of gem thefts occurs amongst the luxury hotels of the spectacular French playground, it appears that 'The Cat' is on the prowl once again. Robie might be reformed, but is he deviously using Frances to gain access to the tempting collection of fabulous jewelry...

Harry Willard packs up his family and sets sail for a long-awaited "dream" vacation to romantic France. However, their trip includes some unforeseen adventures.

A shy princess's head tells her to wed a worldly Crown Prince, but her heart is drawn to a dashing commoner. Garbed in dreamy Helen Rose gowns, surrounded by Mittel-European opulence, the leading lady dances, duels, flirts, falls in love and makes even the most jaded moviegoer want to believe in fairy tales.

Grant plays Roger Thornhill, an adman mistaken for a Federal intelligence agent caught up in an exciting series of events as only Hitchcock could deliver.