"Set in the 1890s, West plays a brash barroom entertainer with a soft spot for men in trouble, especially the mission director, young Cary Grant. She unknowingly gets caught up in a murder, as well as a white slavery ring, and sets about clearing things up as only Mae can. In between rescues she manages to perform some of her heated, hip-swinging classics including a steamy belting of 'Frankie and Johnnie."