1944, Artek. The girl Nadia, along with the children of the German captain, paints ribbons for the wish tree. The Germans do not want to surrender Crimea, but Vera Nadezhda lights the red banner of Soviet soldiers on Mount Ayu-Dag, predicting the enemy's imminent defeat.

Spring 1941. The peaceful life of three friends, two Sergeys and Ekaterina, from a small village in Kuban is interrupted by a sudden declaration of war and the landing of fascists in the Caucasus. The guys in love with Ekaterina volunteer to join the partisans, and she stays in the village and asks them to return quickly. Not far from these places, the Germans organize a warehouse with ammunition. The commander of the partisan detachment receives an order to destroy the enemy and blow up the warehouse. Two Sergeys are sent on a dangerous mission.