Based on a real event, twelve dead bodies are found in the Tula River, we see the events that lead up to the massacre in a tale of crime, vice, corruption and sleaze.

Directed by: Ismael Rodríguez Jr.
Written by: Ismael Rodríguez & Jorge Manrique & Ismael Rodríguez Jr.
Release date: 1985-08-22
Runtime: 85 minutes
Tagline: A real life incident that shook Mexico.
Cast:
Cuitláhuac Rodríguez Cuitláhuac Rodríguez
Victor 
Narciso Busquets Narciso Busquets
Pancho 
Roxana Chávez Roxana Chávez
La Parabólica 
Abril Campillo Abril Campillo
Estrellita 
Carmen Salinas Carmen Salinas
La Madrastra 
Gerardo Zepeda Gerardo Zepeda
La Madrina