Estranged couple Boris (Aleksey Rozin) and Zhenya (Maryana Spivak) are going through a messy and painful divorce. Both have moved on to new partners but their race to begin new lives is complicated by their 12-year-old son, Alyosha who is increasingly pushed to the back of their minds. When Alyosha goes missing during his walk home from school, Boris and Zhenya are forced to reckon with the consequences of their toxic marriage. Acclaimed filmmaker Andrey Zvyagintsev (Leviathan), who has shown an impeccable ability to illuminate the bleak reality of contemporary Russian society, crafts a hauntingly brutal story of loss, resentment, and moral detachment.