A veteran policeman named Fernando feels a lot of hatred against Ángel because the boy ran him over with a car leaving him lame. Now Fernando accuses the young crook of having participated in a robbery at a gas station in which a murder has occurred. Helped by his friends, Ángel rebuilds the facts that serve him as an alibi, but while he is in pre-trial detention in La Modelo prison (Barcelona) a terrible mutiny will take place.

Madame Olga is the owner of a luxurious brothel in London, England. One of the brothel's new clients, a young man, falls in love with her. He wishes to have more than sexual relationships with the woman.

A young woman participates (unknowingly) in a satanic ceremony and gets possessed by the spirit of her late father.

The film depicts ten years of Catalan history, from 1899 with the defeat of the Spanish side in the Cuban War of Independence to the Tragic Week 1909.

In the middle of the first world war, Barcelona is the center of multiple operations related to war, although Spain is a neutral country.