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...

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.

An ad executive is mistaken for a spy by foreign agents.

A New York critic, Parker Ballantine, writes pointed reviews that close insufferably lousy plays. But there's a new play in town by his wife, Angela. Is it bad? Will Parker grind it up in his typewriter? If he does, he may find he's married for "bitter" and for worse!