Once, the house in quiet Mukhino belonged to the well-known chemist Sikorsky, but after his death the rooms were rented out to whoever wanted them. Under one roof gathered a company of random people who, because of quarantine, were forced to spend time with one another. But one evening something terrible happened: in the garden, the body of an unknown man was found. All the residents of the house fell under suspicion. Soon it became clear that the tenants are connected to each other by complicated and not particularly friendly relationships. And the old house itself holds too many secrets and seems to live its own mysterious life: portraits come to life, things disappear and reappear, ancient clocks strike whenever they please… One of the inhabitants, Alexandra, decided to put an end to all this nonsense and find the culprit on her own. And it seems she succeeded…