In an elite secluded mountain hotel, old acquaintances gather. Vacationing there is also Zhenya with her husband Tamerlan. Because of a snow blizzard, the hotel is cut off from the outside world, and at night a mysterious murder occurs: in the library they find the body of a well-known businessman Tigran Teosyan with an ancient dagger in his chest. Tamerlan takes on the investigation, but the more he learns about the guests gathered at the hotel, the more he realizes that the murderer could be anyone of them.