For 30 years until the sixties of the twentieth century, several families survived an intriguing story. The Ignatievs, Kalugins and Eliseevs, or rather their representatives, will be at the center of all events. The main character, Ivan Petrovich Ignatiev, experienced a lot: at first he was a polar explorer, then he returned from the war and became a teacher, then his career ladder elevated him to the school principal, who considers the main purpose of life - serving people. In his life appears a mysterious girl - Nastya.