This film is the first of three parts. A double crime has been committed. In the "Hacienda Rosales", two men are killed by gunmen in the service of a powerful and anonymous landowner (a robber baron). One is the rightful owner of a mine rich in a valuable mineral; the other one is the husband of a woman, who at the time of the double murder, and to avoid that the location of this mine gets in the gunmen's hands, destroys the map on fire, in order to protect the location of the mine, keeping it in her memory. For this reason she is kidnapped by the gunmen to present her to their secret employer. Cristian, then a teen, the son of the couple, is the witness of all this. Years later, the time for "El Látigo Negro" (The Black Whip) has come. To strike back against the mysterious robber baron, and to claim for justice, and return to each what belongs to.