In addition to Melanie and Pancho, Paul is introduced to Raymond Le May, who works as the secretary to the casino director and is in Melanie's thrall Louis, a seasoned safecracker and Hugo Baumer, an expert mechanic and get-away driver. Reluctant to commit himself, the cautious Paul agrees only to meet Theo's five accomplices at a tawdry club, where Melanie performs seductive dances while Pancho plays saxophone.

Pancho and Melanie are two of Theo's five accomplices in an elaborate caper he is planning, and Theo begs Paul to join them and be the 'one friendly face among strangers.' Theo, who was once a prominent science professor before turning to crime and being unceremoniously 'cast out into the gutter,' has devised his revenge in the form of what he terms an elaborate experiment that will make the world gasp-the $4,000,000 robbery of the Monte Carlo casino. When the wary Paul wonders why Theo suddenly sent him a plane ticket to fly to France, Theo takes him to a sidewalk café, where Pancho and Melanie, seated at a rear table, size him up.

On the French Riviera, Theo Wilkins reunites with his old friend Paul Mason, who has spent the last three years in an American penitentiary.

Cast of 7 casino movie