Martine Carol plays the title character in the comedy melodrama Nathalie. The heroine is a professional model who becomes innocently mixed up in a robbery/murder case. Deciding to play detective, Nathalie leads both the authorities and the underworld on a merry chase. She also wins the heart of police inspector Franck (Michel Piccoli), who does his best to shield her from the evil machinations of criminal mastermind Coco (Philippe Clay).

Source : allmovie.com