An Austrian medical student living and working in France is arrested by the police while on holiday in the south of the country. Accused of espionage, he is sent back to his hotel to uncover the real spy. His freedom and his chance of becoming a French citizen hinge on what he can discover. Cast: - James Mason as Peter Vadassy - Lucie Mannheim as Madame Suzanne Koch - Raymond Lovell as Robert Duclos, a hotel guest given to exaggeration - Julien Mitchell as Michel Beghin - Herbert Lom as Andre Roux - Martin Miller as Walter Vogel - Clare Hamilton as Mary Skelton, a hotel guest attracted to Peter (real name Florrie Fitzsimons, sister of Maureen O'Hara; this was her only film appearance) - Frederick Valk as Emil Schimler, alias Paul Heimberger - Patricia Medina as Odette Roux - Anthony Shaw as Major Anthony Chandon-Hartley, a guest - Laurence Hanray as Police Commissioner (as Lawrence Hanray) - David Ward as Henri Asticot, a guest - Valentine Dyall as Warren Skelton - Joseph Almas as Albert, the waiter (as Josef Almas) - Patricia Hayes as Woman - Hella Kürty as Hilda Vogel - Ivor Barnard as P. Molon, the pharmacist - Ernst Ulman as Detective in Black Suit Runtime: 79 minutes