Strange things are happening in an old mansion on Chistye Prudy, which has not been listed in any documents for some time. On a Saturday morning in March, two friends living in this ghost house, Lipa and Lucinda, fall... the corpse of a neighbor. Moreover, the body is wrapped with explosive wires. The residents of the ill-fated house gathered at the scene, neutralizing the blast wave, are saved from death by a new neighbor Pavel Dobrovolsky.