Sheila's uncle has just died ;many of his relatives come,but ,much to their displeasure, it's his niece who inherits his private detective agency.But she must first go through a training in a school:gymnastic,assault course,machine gun shooting ;she must also learn how to cheat at card games .Her first mission is to find back gangster La Rafale's fiancee ,Genevieve ,who ran away with another gang.She meets a handsome Interpol lieutenant she falls in love with.