During the Second World War in July 1941, Colonel Sermonti led an Italian regiment sent to the Soviet Union as part of the CSIR to assist German forces on the Eastern Front. The initial enthusiasm of the Italian soldiers quickly gave way to a harsh reality - vast landscapes, challenging weather, hostile locals, mistreatment by the Germans, tough battles, scorched-earth tactics, strained relations with allies, and a stalled offensive near Moscow all took a toll on their morale.
The troops' spirits collapsed definitively the following year when the CSIR, now part of the 8th Italian Army, supported German forces during the second summer offensive. The Soviets launched a counteroffensive, forcing the Italians to defend on the banks of the Don River and eventually retreat.
The story revolves around a group of soldiers, including Loris, a naive Romagnol farmer who died while following a Russian girl into a sunflower field; Collodi, a Tuscan typesetter who perished due to a comrade's thoughtless action; Calò, a Sicilian who, along with the colonel, became a Soviet prisoner; Major Ferri, a hidden fascist killed by fellow Italians during the retreat; and Libero, a Roman plumber who, after Giuseppe's death, left the group, attempting to return alone and succumbing to hardships in a storm.