Lupe Vélez plays a dual role, twin sisters Rita and Elaine. After escaping a torpedoed ship, Rita shows up in Manhattan, where she takes the place of her Broadway-star twin sister Elaine, who's having problems with her marriage and needs to make a getaway. Neither Elaine's husband or Rita's saxophone-player boyfriend are aware of the switch.

"Song and Dance...Swing and Romance...To Knock You For a LUPE!"