The film tells about the friendship of two boys – Seryozha and Aghvan. Their fathers were best friends in childhood, but the betrayal of Sergei's father forever crossed out the friendship, and their paths parted. Agvan's father Andrey (Vadim Badmatsyrenov) became a police officer, and Seryozha's father managed to serve time for murder. And now, 10 years later, they met again. An extreme situation puts everything in its place: while children are trying to escape from trouble, adults are figuring things out, as a result of which a 10-year-old mystery is revealed…

11-year-old Vadim is withdrawn and lonely, his parents are getting divorced. Mom leaves Vadim with his grandfather on Lake Baikal for the whole summer. On the shore of the lake, Vadim gets acquainted with an unusual animal — the Baikal seal. The seal will help the boy find friends and save his parents' marriage.

Five young men set out in search of Kolchak's legendary gold, following a map accidentally discovered in the museum's storerooms. Each treasure hunter pursues their own goals, but a tragic accident changes all their plans and forces them to act according to the brutal rules of the "gold rush." ​​Unexpectedly, the expedition's search is overtaken by the centuries-old past of these places—those very same fractures in time prophetically spoken of by one of the gold bar hunters. The Reds and Whites, exhausted by the civil war, also have their own plans for the gold of the Supreme Ruler of Russia...