Sebastián Herranz

A man has had a werewolf curse cast upon him. If he doesn't get rid of it, he turns into a killer werewolf when the moon is full.

Dale and Helen Brais are a marriage of farmers who subsist on what little they manage to get from their land. One stormy night, a stranger enters their home to rob and Dale kills him incidentally. The intruder is Red Burket, head of a band that is dedicated to sabotage the new railway line and there is a bounty on his head of $20,000. What seems the solution to the problems of the couple becomes the beginning of a nightmare.

The purchase and sale of ranches that occupy land where the railway has to pass causes various problems. Also, a gold mine in these lands creates several disputes.

A boxing manager discovers that one of the boxers who have been promoted in love with a protected model and his mistress. Mad with jealousy, organized a match between it and another fighter who are friends with each other. Revenge in this case will be bitter.

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.

The same day of their marriage, Jean's wife dies of a strange ailment in the middle of surgery. Afflicted by the loss, the young man abandons his medical studies and takes refuge in the memories of his time of courtship. At the same time that this happens, a wave of murders shakes the city with the same pattern of behavior: the victims are surgery students whose bodies have had both hands amputated.