The year is 1943. Anna Petrova is a combat pilot who was seriously injured. She returned to the rear and works as a leading engineer at an aviation plant, where new Gyrfalcons aircraft are being prepared for testing. The plant's management, unaware of the consequences of her injury, instructs Anna, together with Major Zotov, to drive the prototype of the Gyrfalcon to the front. In addition to the desire to defeat the enemy and return home with a victory, Anna pursues a personal goal. She is determined to get even with Major Briggel, the German pilot who killed her lover.

Zero. Winter. Ural city. A high school student is beaten on the street. He is dying. Parents experience the tragedy in different ways. Mother finds the diary. Only after the death of her son does she begin to understand how he lived. The father is obsessed with revenge and is looking for killers.

Single mother Maria lives with her son and daughter in a science city, which is being prepared for liquidation. She believes that her physicist husband, who disappeared six years ago during a scientific experiment, is somewhere nearby — just in another dimension. A former colleague of her husband arrives in the city in search of the missing person's records, and Maria has a boyfriend-trucker Stas, ready to take her away with her children and start a new life together. Faced with a choice, a woman can not decide to leave her invisible husband.

In the summer of 1945, between the Victory over Germany and the war with Japan, 10-year-old Petka from a Far Eastern village tries to save a dying friend from a mysterious illness. But the only one who can help him is the Japanese prisoner Hirotaro from a military camp nearby. Petka and Hirotaro will have to find a common language, trust each other and call for help not only science, but even ancient spirits.

In a Russian country house, two boys, Anton and Zhenya, shoot air rifles at bottles. Anton suddenly fires at a cat, shocking Zhenya. Their friendship becomes strained. That evening, Anton's father takes them to the river and recalls his own childhood, when he built a forest shelter together with a friend. As night falls, Anton tries to reconcile, but Zhenya rejects his friendship. The next day, at the bus stop, they part without speaking, their silence filled with unspoken tension and guilt.

On New Year's Eve, nine-year-old Vanya from Kirov, having learned of his parents' separation, sets off for Veliky Ustyug to ask Father Frost for a miracle.