The year is 2010. The base of the Pacific Fleet of the Russian Federation. On the destroyer "Bystry" there is a breakthrough in the fuel pipeline with fuel oil. Short circuit, fire. There are 348 people on board. Aldar Tsydenzhapov, a 19-year-old sailor from Transbaikalia, who has dreamed of serving in the navy since childhood, like his grandfather, decides to resist the fire without hesitation.
Hoping to distract the boy from the loss of his mother, his father takes him to his grandfather for winter fishing. But the family falls into a blizzard and is lost on the ice of the largest lake in the world. Love and the mysterious powers of Baikal will help them overcome grief and find each other.