Mercedes (Marga Lopez) dancings for cash with the clients of Salon Mexico, a famous cabaret in Mexico City. Her younger sibling Beatriz (Derbez) research studies in a costly private school, paid by Mercedes. Obviously, young Beatriz doesn't learn about her sister's work. Difficulties start when Mercedes wins a danzon competition with Paco (Acosta), her pander. Paco refuses to share the reward with Mercedes, so she swipes the money when he's sleeping.
Mercedes (Marga Lopez) dancings for cash with the clients of Salon Mexico, a famous cabaret in Mexico City. Her younger sibling Beatriz (Derbez) research studies in a costly private school, paid by Mercedes. Obviously, young Beatriz doesn't learn about her sister's work. Difficulties start when Mercedes wins a danzon competition with Paco (Acosta), her pander. Paco refuses to share the reward with Mercedes, so she swipes the money when he's sleeping.