Semeynaya tayna (2018)

All relatives and friends of the family gather for the holiday, and Margarita asks Oleg to watch the guests. He looks at the crowd and understands that everyone may be interested in the death of the head of the family: an old friend with a mysterious companion, a young mistress, and even a faithful maid. The next night after the holiday, murder does occur, but the victim becomes another. Oleg will have to unravel the fatal tangle of family secrets and remove all the masks from the suspects.