A former felon is blackmailed by a corrupt policeman and forced to commit a crime.

"El Tarzan" Lira is an ex-convict who decides to give up his criminal past and reform his life. However, a corrupt policeman blackmails him leaving "El Tarzan" no other option but to continue committing robberies. Adapting the genre conventions of the film noir to the Mexican context, Ripstein's film focuses on Mexican police corruption and questions the judicial system.—Leo Urbina