
Master thief John Robie has retired to the French Riviera and is enjoying retirement there when a series of thefts occurs, perpetrated according to his methods. To prove his innocence, Robie tries to unmask the culprit. In the process, he meets and falls in love with American Frances Stevens, but the romance comes to an abrupt end when her mother's jewels are stolen. At a masquerade ball, Robie tries to catch the real thief and win Frances back.
