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.

World War II. In autumn 1941 the German troops completely surrounded one of the biggest Russian cities — Leningrad. 2,5 million civilians got trapped in the city. The German commandment decided to destroy the city with bombings, artillery attacks and, most importantly, with hunger. The most difficult first winter of the siege (1941 — 1942). A young woman Olga is walking through the whole city to her father. She wants to see him one last time to say goodbye and to ask for his forgiveness.