The head of the laboratory of the academic research institute, Alexander, in an empty grandmother’s house, accidentally finds in the attic, in a pile of old dusty books and papers, a strange drawing “Moon Barn”, made by his uncle immediately after returning from the front. Unfortunately, robbers steal the painting. Trying to find a family heirloom, Alexander learns that long contemplation of this picture causes attacks of sleepwalking, and that somewhere there is also a pencil analogue of the “Moon Barn”, which acts as an antidote against dangerous addictions. The clock counted. A person in possession of these paintings could have caused an irreparable disaster...