The novel, which formed the basis of the legendary film of the same name, loved by many generations of Russian viewers. Relatives and friends gather at Lord Warbeck's family castle for Christmas. Suddenly, right during dinner, Robert Warbeck, the only son and heir of the old lord, dies. What is it - murder or an accident? There is nowhere to wait for help in the investigation - the mansion is cut off from the world by snowfall, the telephone line is disconnected. Will the guests be able to independently figure out the killer hidden in the house or will someone become his next victim?