A masterpiece of social critique. The acting and directing are flawless. An Andrey Zvyagintsev film, it tells the story of a kid who disappears in the midst of his parents going through a divorce. Zvyagintsev is not subtle about anything here, his movie is incredibly purpose-driven and as such it is a sad and accurate depiction of a decaying marriage or a marriage that should have never happened. Eventually, and using the plot as a vehicle, it becomes a criticism of the current state of the Russian middle-class and society in general. An important and devastating character study.