October 1941. Thousands of fascists troops are advancing on Kalinin to capture the city and therefore open a direct route to Moscow. There are two thousand people able to defend the city and they are without tanks or artillery. The only hope of holding the enemy off is in the fifth infantry division convoy, who are about to pass through Kalinin station. But saboteurs intend to do everything to keep this from happening. The head of the Kalinin garrison, Major Sysoyev, struggles to keep order and calm in the city, and himself falls under suspicion of involvement with the subversive enemy group.