A writer in 1930s Moscow has his work banned and is expelled from the official union, leaving him without income. He then writes a novel about a mysterious dark visitor and gradually starts confusing his real life with the story.
In the Chertanovo area, known for periodic invasions and attractions, the Prince of Darkness himself suddenly appears. He has grandiose plans, but to implement them, he needs the help of his son, a supermarket cashier, who has a lot of questions for his father from hell. The all-powerful Prince of Darkness will have to build relationships with earthly relatives in order to carry out his plans and teach humanity a lesson.
Matvey is a young diligent altar boy who dreams of becoming a priest. Agata is a spontaneous, daring artist who is not used to planning ahead. After meeting Matvey and Agata, they realize that their seemingly different worlds are united by the same problems and values. But can they really understand it?
