Mercedes works as a cabaret performer to pay for her sister's studies. Problems begin when Mercedes and Paco, her exploiter, win a dance contest, but he refuses to share the prize with her.

Marga López
as Mercedes Gómez

Miguel Inclán
as Lupe López

Rodolfo Acosta
as Paco

Roberto Cañedo
as Roberto

Mimí Derba
as Señora directora

Carlos Múzquiz
as Dueño cabaret

Fanny Schiller
as Señorita prefecta

Estela Matute
as Cabaretera; Amante de Paco

Silvia Derbez
as Beatriz Gómez

Luis Aceves Castañeda
as Complice de Paco (uncredited)