All relatives and friends of the family gather for the celebration. Margarita asks Oleg to keep an eye on the guests. He looks at the crowd and realizes that everyone may be interested in the death of the housefather: an old friend with a mysterious chaperon, a young mistress, and even a faithful maid. During the next night after the party, the murder occured, but someone else became a victim. Oleg will have to unravel the fatal tangle of family secrets and make the suspects remove all of their masks...