Aspiring author Agnes Dumont (Brigitte Bardot) gets into hot water when she publishes a racy story under a nom de plume and her strict father (Jacques Dumesnil) finds out. Fleeing to Paris to room with her brother, Agnes unwittingly pawns a priceless book and must raise a fortune quickly. Disguising herself as the sexy Sophia and entering a striptease contest, an embarrassed Agnes is horrified to discover that her new boyfriend, Daniel (Daniel Gélin), is in the audience.