Grown-Up Children: Anatoli Kuzmich retired and received a separate apartment in a new house. He and his wife are happy and make bright plans for the future: how they will go to theaters, museums, read their favorite books. But their daughter Lyusya suddenly gets married. Not wanting to part with her, Korolyovs persuade the young spouses to live with them in a new apartment. Soon a child is born, and gradually life together becomes unbearable.