Still living under the same roof, the Moscow couple Boris and Zhenya are in the final stages of a bitter divorce. As both have already found new partners, insults pour down like rain in a toxic family battle zone, always pivoting around the urgent matter of the custody of Alyosha, their 12-year-old only son. Unheard, unloved, and above all, unwanted, the introverted and unhappy boy feels that he is an intolerable burden. When Boris and Zhenya finally realize that Alyosha has been missing for nearly two days, it is already too late. But is this a simple case of a runaway teenager?