"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)
Francisco Reiguera
Stephen Berne
as Hombre en cabaret (uncredited)
Rogelio Fernández
Regino Herrera
Irma Dorantes
as Estudiante (uncredited)
Magdalena Estrada
as Cabaretera (uncredited)
Maruja Grifell
as Profesora (uncredited)
Ana María Hernández
Héctor Mateos
as Mesero (uncredited)
Enriqueta Reza
as Vendedora de flores (uncredited)
Humberto Rodríguez
as Velador (uncredited)
José Torvay
as Policía (uncredited)
Hernán Vera
as Gerente hotel (uncredited)
Ignacio Villalbazo
as Superintendente (uncredited)
Ana María Villaseñor
as
Mauricio Magdaleno
Story
Emilio Fernández
Director
Gloria Schoemann
Editor
Alberto A. Ferrer
Production Manager
Fernando Marcos
Executive Producer
Felipe Palomino
Assistant Director
Antonio Díaz Conde
Music
Gabriel Figueroa
Director of Photography
Salvador Elizondo
Producer
Jesús Bracho
Production Design
Ana Guerrero
Makeup Artist
José de Pérez
Sound Re-Recording Mixer
Ignacio Romero
Camera Operator
Rodolfo Solís
Sound Recordist
Daniel López
Lighting Technician
Pablo Ríos
First Assistant Camera
María E. Salazar
Hairstylist
Manuel Alcayde
Script Supervisor
Screenplay