Detective-Inspector Meredith and Sergeant Strang are heading to the French Riviera to assist in breaking up a currency counterfeiting ring, and bring at least one of its members back to England with them. Along with their French colleagues Blampignon and Gibaud, they quickly pick up a trail that leads to the Villa Paloma, where rich widow Nesta Hedderwick lives with her niece Dilys, her companion Miss Pillgrew, the gigolo-esque Tony, his friend Kitty, and the artist Paul Latour. They're soon joined by Bill Dillon,…