During the
Spanish Civil War, an American language teacher, Robert Jordan, who lived in Spain during the pre-war period, fights in the
International Brigades against
Francisco Franco's forces. An experienced dynamiter, Jordan is ordered to travel behind enemy lines and destroy a critical bridge with the aid of a band of local anti-fascist
guerrillas. The bridge must be blown up to prevent enemy troops from traveling across it to respond to an upcoming offensive against the fascists. Jordan meets an old man, Anselmo, who is a guerrilla fighter who will serve as Jordan's liaison with the local guerrilla fighters. Anselmo leads Jordan to a group of Republican guerrillas who are led by a middle-aged man named Pablo. Jordan falls in love with one of the guerrillas, a young woman named María. María's life was shattered by her parents' execution and her gang-rape at the hands of the
Falangists (part of the
fascist coalition) at the outbreak of the war. Jordan has a strong sense of duty, which clashes with the unwillingness of the guerrilla leader Pablo to commit to helping with the bridge-blowing operation, as it would endanger him and his band. At the same time, Jordan develops a new-found lust for life which arises from his love for María. Pablo's wife Pilar displaces Pablo as the group leader and pledges the guerrillas' allegiance to Jordan's mission. However, when another band of anti-fascist guerrillas, led by El Sordo, is surrounded and killed in a desperate
last stand, Pablo destroys Jordan's dynamite detonation equipment, hoping to prevent the bridge demolition and thereby avoid fascist reprisals on his camp. Later, Pablo regrets abandoning his comrades and returns to assist in the operation. ), who acts as Robert Jordan's guide. However, the enemy, apprised of the coming offensive, has prepared to ambush the Republicans in force and it seems unlikely that blowing up the bridge will do much to prevent a
rout. Regardless, Jordan understands that he must still demolish the bridge in an attempt to prevent fascist reinforcements from overwhelming his allies. Lacking the equipment destroyed by Pablo, Jordan and Anselmo improvise an alternative method to explode the dynamite by using
hand grenades. Jordan attaches wires to the grenades so that their pins can be pulled from a distance. This improvised plan is considerably more dangerous than using conventional detonators, because the men must increase their proximity to the explosion. While the guerrilla fighters—Pablo, Pilar, and María—create a diversion for Jordan and Anselmo, the two men plant and detonate the dynamite, costing Anselmo his life when he is hit by a piece of debris from the falling bridge. While the guerrillas are escaping on horseback, Jordan is maimed when a fascist tank shoots his horse out from under him. Jordan cannot feel his legs and he knows that if his comrades stop to rescue him, they too will be captured or killed. He bids goodbye to María and ensures that she escapes to safety with the surviving guerrillas. Armed with a
Lewis machine gun, he waits until the horse-mounted fascist soldiers appear in his gun sights. He then pulls the trigger, firing a sweeping barrage at the oncoming soldiers. The film ends with Jordan firing the Lewis gun directly at the camera. ==Cast==