The film is based on real events. This is a story about exciting events that occurred in the life of the smallest soldier - the hero of the Great Patriotic War, six-year-old Sergei Aleshkov. He lost all his relatives and got into the army. With a six-year-old boy, they started playing the soldier game in order to preserve his childhood, and he, in order to comply with this honorary title, became a real defender of the Motherland.