The film tells about the transformation of one of the greatest waterways of Yakutia - the Lena River. Landscape of Northern Yakutia. Construction of the Vilyui hydroelectric power station on the Lena tributary. Winter industrial landscape. Map showing the presence of minerals in the territory of Yakutia. Passage of trains on the Bratsk-Osetrovo railway. Osetrovsky river port on the river. Lena. Containers with cargo in the port. Loading cargo onto ships and barges. Vessels TO-1501, SPN-661, SPO-V36, Tr-1015, made at the Osetrovsky and Kachugsky shipyards, are passing by. Icebreaker "Sungari" blazes a path through the ice. The track fleet behind the clearing of the fairway.