Altai map. Two groups of children "Severyane" and "Yuzhane" set off on a hike. The guys get into the cars. The guys observe the flora and fauna, make notes. Types of mountain rivers, lakes, steppes, mountains. A herd of marals. The guys are visiting local residents: Oirots - nomadic livestock breeders. "Southerners" are sailing on a steamer on the Irtysh River. Ridder town. Types of industrial enterprises, factories, streets, houses. View of the Katunsky ridge, Gebler glacier. Guys at the Rasypny waterfall. Meeting of two groups of children. Camp is set up. A group of climbers is visiting the guys. Climbers climb Mount Belukha. Pioneers watch the climbers ascending through binoculars.