Zhenya and Boris are going through a vicious divorce   marked   by   resentment,   frustration and  recriminations.  Already  embarking  on new lives, each with a new partner, they are impatient  to  start  again,  to  turn  the  page  – even if it means threatening to abandon their 12-year-old son Alyosha. Until, after witnessing one of their fights, Alyosha disappears...