Old keys room

A well-known psychologist Anzhei Kovalsky lives in a luxurious mansion in a village near Moscow. He has an unusual technique: he collects vintage keys all over the world, and then, having listened to a specific patient, selects a key from his collection, whereupon the inspired owner of the key finds a way out of a difficult situation independently. And now Kovalsky himself is in a difficult situation: detectives his housekeeper Anatoly disappeared and the owner hires Ilyushin and Babkin to search for him. They come to the mansion together with other guest-patients and start a secret investigation. There is too much strange in the case. The housekeeper was obviously out of Anzhei's favor; he did not even inform the police after the housekeeper's disappearance and clearly concealed something from the detectives. And his guests, each in their own way, are suspicious. Makar believes there is a dangerous fanatical member of the Gatekeepers' sect under the guise of one of them ...