Prisoners in Petticoats

The title refers to a penal institution the lead character spends a little time in that is not populated by the usual hardened dyke matrons.) 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.