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

A Spanish police chief hires an undercover agent, Eagle, to infiltrate a gang of heroin smugglers. Infiltrating the gang, he uses a female agent as a point of contact. However he discovers that there bigger goings-on than dope. The gang is involved in the transportation of smuggled uranium for the manufacture of nuclear arms for sale to Libya and other aspiring third world countries.

A patient is released from a mental hospital to help the police find a student who disappeared a few days ago.

While the Torete rob banks, the Heifer, another delinquent who has not noticed it, enters the same place to rob him. After failing the coup, both decide to associate.

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.