Something broke down in Andrey and Nadia's marriage. He goes to live in Moscow, she and the children stay in Irkutsk. On New Year's Eve, the family gets together again, but it seems to be the last time. The word "divorce" sounds quite definite. On January 1, it would seem that everything has already been decided, but a whole chain of events - funny, sad, sometimes even strange and inexplicable - seems to be keeping the family from taking the wrong step. They will all get lost and find each other on this magical night on the island of Olkhon and realize that past grievances are easy to forget, but there is something much more important in life.