Le Bal des espions (1960)
Directed by Michel Clément, Umberto Scarpelli

Film Synopsis

Ernst Schenker, a former German spy, is keen to bring an end to his 'business', but first he must orchestrate a set-up that will destabilise two rival gangs.  After this, he plans to leave for the Middle East, never to return.  Essential to his scheme is the recovery of an envelope containing some important papers.  Before Schenker can make a safe exit from his dangerous career he is shot dead.  His young window Olivia makes up her mind to take over where he left off.  Very soon she discovers that her husband was planning to fly to Caracas, not with her but with Flora, a cabaret singer.  With the help of Brian Cannon, an agent attached to the allied forces of Europe, she sets out to find the mysterious envelope, unaware that others are keen to get their hands on it...