Single mother Irina Voronova is raising her ten-year-old son Alyosha and taking care of her younger sister after the loss of her mother. Once she was truly happy and in love with Dmitriy, but because of the intrigues of their classmate, her lover left her, not even suspecting that she was pregnant from him. Without finishing medical school, Ira went to the city to visit her mother and younger sister.