A hunt for a spy in a hotel in the South of France just before World War Two.

James Mason
as Peter Vadassy

Lucie Mannheim
as Mme Suzanne Koch

Raymond Lovell
as Robert Duclos

Julien Mitchell
as Michel Beghin, intelligence chief

Herbert Lom
as Andre Roux

Martin Miller
as Walter Vogel

Clare Hamilton
as Mary Skelton

Frederick Valk
as Emil Schimler, alias Paul Heimberger

Patricia Medina
as Odette Roux

Anthony Shaw
as Major Anthony Chandon-Hartley
CinemaSerf
James Mason is having an holiday in an hotel in France just before the outset of WWII. When he goes to collect some developed photographs he has taken, he is detained by the police who accuse him of illegally photographing sites around Toulon that might be of interest to the enemies of the Republic....