Desc: Prisoners in Petticoats: Directed by Philip Ford. With Valentine Perkins, Robert Rockwell, Danni Sue Nolan, Anthony Caruso. Joan Grey is a young pianist that falls for the good manners and nice clothes of a gang of mobsters. She is warned by Mark Hampton, an investigator, that she is associating with gangsters and she is heading for trouble. She refuses to believe him and becomes innocently involved in some robberies and killings.