In the summer of 1932, Sergei Lukonin, a young man from Saratov, leaves his hometown for the distant city of Omsk to attend tank school. His fiancée, Varenka, who soon became an actress, remained in Saratov. In 1936, Sergei went to fight in the Spanish Civil War. He was wounded, taken prisoner, escaped, and returned to training battles, with June 1941 looming ahead.