The events of the Russian comedy series "On the Bottom" unfold in a typical apartment building in Nizhny Novgorod. A 28-year-old guy named Stepa is released from prison on parole and decides to start a new life. He inherits a room in an old communal apartment from his grandmother and becomes an honest plumber. However, along with the living space, he also inherits problems. It turns out that the deceased old lady hid 2.5 million somewhere in the apartment, which he now has to return to the police.