Over the years, Mateo falls for Caridad, but she is in love with a Mexican captain, Martin (Pedro Armendáriz), who met her at the port.
Caridad work in a cabaret in the port and the owner, Guevara (René Cardona), is attracted to her, and in a moment of jealousy, tries to kill Martin.
But somehow Mulata is probably the film that is closer to the cultural roots of Sevilla, ethnic and social concerns and the varied and different forms of love that made her life so rich.
Adapted from Mulatilla: Black Stamp, a novel by the Uruguayan writer Roberto Márquez Olivencia, the action takes place now in Cuba and tells the story of Caridad (a name that echoes the name of the Virgin patron of the island), the beautiful daughter a black slave who has to fight against those who exploit high positions, and men who only want her as a sexual object.
There is a long sequence on the beach that covers a celebration of a ritual dance of Santeria, the Yoruba religion shown by Ninon as important in her films as Victimas del Pecado and Yambaó.