Inspired by the classic novel by journalist and writer Emilio Romero. Shortly before the outbreak of the Spanish Civil War (1936-1939), a group of Phalangist friends, who dream of a revolution to transform Spain, are dedicated to spreading their ideas among the population. As war begins, one of them, Lopez, is about to be shot, but is saved by a Republican. Then he joins the national side. After the war, an old comrade encourages him to involve in an operation to destroy the maquis of Asturias. Although he is married and has children, he accepts the proposal, infiltrates among the guerrillas and convinces them that he will provide weapons to continue fighting.

Rafael, Miguel and Gabriel are three boys of different social status, who come to the call of the Flags of Hunters Parachute enroll in their ranks. Between them comes a great friendship and starring a host of incidents, until Rafael starts a relationship with Milagros, an attractive girl of Alcala.