Marche ou crève (1960)
Directed by Georges Lautner

Film Synopsis

A former member of a French espionage agency, Stephan Borba seeks to put his past behind him.  He now leads a quiet life in Belgium with his wife Denise, working as a miner.  Meanwhile, his former associates continue their activities, but are now divided into two rival groups.  One is managed by Milan and works for France; the other is led by the group's original leader Lenzi and lends its services to whoever offers the most money.  Lenzi is not troubled by a conscience and is assisted in his dubious activities by Edith, a young adventuress who is not easily scared.  To obtain some documents in Lenzi's possession, Milan coerces Stephan into helping him, threatening to harm Denise if he refuses.  After a long and violent run-around on Amsterdam's docks, Stephan finally manages to get his hands on the precious documents and hides them deep in the mine where he works.  As Stephan forces Milan to exchange his wife for the secret papers, Lenzi and Edith are pursued by the foreign power to which they agreed to sell them...