Valuable documents have been stolen from a British laboratory. Slim Callaghan is sent to investigate the theft. But his tracks soon lead him to the welcoming skies of the Côte d'Azur. There, he decides to infiltrate a network of aristocratic spies.
Slim Callaghan
Doria Varette
Count Haragos
Commodore Schoubersky
Irania Trasmonti
Amédée
Inspector Vadet
Prof. Ephraim Ponticollo
'La Montalban'
Countess Haragos
Nicholls
Gonzalès
(uncredited)
(uncredited)
(uncredited)
Souvaroff (uncredited)
