A matlachín, a singer/drummer, and an elder from the Saltillo dance tell that they have to fulfill a "mandate" for the eternal rest of one of their ancestors: Rosita Alvírez, who, by disobeying her mother, meets her tragic death by attending a dance in a hall in the capital of Coahuila, back in the year 1900. The religious dance they perform is to obtain the necessary indulgences since they know the other story of this character and therefore believe that she currently wanders as a "lost soul" through the streets of her locality.