Vivien Leigh and Conrad Veidt star in this dashing spy thriller set in Sweden during the First World War. Spring 1918. Madeleine Goddard (Vivien Leigh) runs an elite fashion boutique - a job that often takes her to Paris. She is also a high-ranking German spy. Vying for her affections are an English secret agent and the charming aristocratic German deserter Baron von Marwitz (Conrad Veidt). When her spy cell appears to have been compromised, Madeleine is sent to Paris to discover the fate of other agents. As her affair with von Marwitz deepens, she must decide which is more important to her love or duty.