On horseback in the forests and mountains of Canada, the land of black bears. But with the bears, in the splendid and remote valleys, other animals also live: Elk with flat horns; deers; the beavers, always building huge dams, that the musky types regularly destroy; tiny multicolored birds and large rapacious; suspicious and shy marmots. The journey of the explorers reaches its goal when it touches the lands where the "grizzly" reigns. And with the first snowfalls, while the bears become ferocious in the harbinger of winter hunger, the caravan resumes its way back.