It's been a year since John Robie, notorious Riviera jewel thief, proved his innocence by catching a copycat burglar. And it's been a year since John has seen Francie Stevens, the adventurous socialite who not only saw through his disguise, but helped him catch the copycat. Now Francie is returning to the Riviera for its first-ever Fashion Week as a model for a top French designer, and John plans on rekindling their romance. But there's a problem. While helping a friend, John chases down a mysterious courier, whose ruthless associates now want John dead. To make matters worse, when Francie arrives, she has a boyfriend in tow, and tells John that she wants nothing to do with him.

John has to figure out why he's a hunted man, and why Francie is acting suspiciously. Digging deeper, he discovers a spy ring with evil intent. As John works unofficially to gather evidence, a question begins to haunt him-could Francie Stevens be a spy? With his enemies closing in, John turns to his cat burglar skills to try to save his life and expose the traitors. To survive, he has to catch the spies before they catch-and kill-a retired thief!