A masked killer prowls the beaches of Argentina, injecting beautiful girls with heroin, and then using weird organ music to make them his zombie slaves.

An old politician is claimed by his party to be a candidate in the next elections.

Directed by Carlos Alonso, the drama is the film version of the documentary chronicle of the journalist José Sánchez Flores about the tragedy that occurred on May 9 of the same year in the town of Pueblo del Oro - today Mendizábal - in the department of Treinta y Tres, a story that is part of Uruguayan folklore and that had the child Dionisio Díaz as the protagonist.

A criminal arrives at a town and involuntarily frees its inhabitants from the oppression of which they were victims.