Cesáreo Torrado

Abel Garrido, a doctor, returns to his hometown to stay. There he meets Mingo and his girlfriend Rita, and they become good friends. But when war comes in 1936, he must go and fight. The events that happen afterwards will take him to confront with Mingo.

Although the title (which translates as "Murders in Chicago") promises a gangster story, this is more of a murder mystery that kicks off with the seemingly accidental death of a construction worker, followed shortly after by that of a noted publisher (an uneasy-looking Eduardo Fajardo). What follows is a very confusing story in which the police, a police coroner (José Campos) and a vagrant (Fernando Sánchez Polack) who witnessed Fajardo's death embark on separate inquests on what actually happened. Meanwhile, June (María Luisa Rubio), who works as a secretary for the publishing company, is under pressure by a blackmailer (Antonio Jiménez Escribano) who has pictures of her in the sack with the deceased publisher.

A band of fierce rustlers is ravaging the region of Las Cruces. Appears an outsider who saves the ranch owner "The Spur" of being kidnapped by members of the band. Thankfully, he was appointed foreman, and his daughter is in love with him. But things are not what they seem and there are murky intrigues in the background.