Once upon a time, a house in the quiet village of Mukhino belonged to the famous chemist Sikorsky, but after his death the rooms began to be rented out to everyone. So, under one roof, a group of random people gathered, who, due to quarantine, were forced to while away time with each other. But one evening a terrible thing happened - the corpse of an unknown person was found in the garden. All the residents of the house were under suspicion. It soon became clear that the tenants had complex and not the most friendly relationships with each other. And the old house itself keeps too many secrets and seems to live its own mysterious life: portraits come to life, things disappear and appear, the antediluvian clock strikes when it pleases... One of the inhabitants of the house, Alexandra, decided to put an end to all this devilry and find the culprit yourself. And it seems she succeeded...