When a favour to a friend leaves Cal Jardine caught up in the Spanish Civil War he finds that he must take a bunch of athletes and turn them into fighters. He meets the revolutionary Juan Laporta and if they do not make a perfect combination as fighters they form an effective one both in Barcelona and then as they advance into the interior. But trouble is brewing in the person of communist diehard Manfred Drecker which threatens the fight and Cal himself. From the street battles of Barcelona to the fighting in the countryside Cal finds action as well as friendship but following a murderous betrayal he must have suitable revenge. (web)