The Night Affair

Inspecteur Georges Vallois is called in to investigate the murder of Albert Simoni, the owner of a night club in Paris. The prime suspect is Lucky Fridel, a young German woman who came to Paris to start a career as a singer. Vallois is seduced by Lucky and ends up falling in love with her, although he discovers that she is a drug addict. Intending to protect Lucky from the police, Vallois pursues his own private investigation, realising that whoever is supplying Lucky with dope is very probably the person who murdered Simoni… —Filmsdefrance.com