Valentin Semyonych is a good-natured pensioner, formerly a children's doctor. His wife died a few years ago and the pensioner lives modestly in a one-room apartment in Khrushchevka, communicating with his only grumpy friend... the houseboy Afonya. Afonya - an employee of the otherworldly GBU Zhilishchnik. On a convenient occasion, he arranged a surprise for Semyonych - a three-room apartment with repairs from the developer in a new monolithic house. But a new house - new problems. Not only for the tenants, but also for the housekeeper.