Madame Rose runs a seedy hotel in a suburb of Paris. Strong-minded but without the least moral scruple, she once killed her husband whose honesty was a hindrance to her business. Under a suspended sentence, she now indulges in smuggling. One day, Victor, one of her former accomplices hounded by the police, finds sanctuary with her. During a drinking spree, he has the bad idea to entrust to her a suitcase filled with bank notes, a loot with which Victor hopes to rebuild his life in South America. But Rose, lured by temptation, betrays Victor, who is arrested by the police.