First, the otter mom planned a fun and practical slide for herself and her cub. Snow is also ideal for this, she thinks, and the two make their way between fir trees and hills by simply sliding down on the well-oiled bellies. The goal is the river, where there are fish to hunt. But there is also a hungry coyote on the water, targeting the two otters. He is not successful, however, because the animals, also called water martens, are simply too good swimmers and the cold river in winter is really not for the coyote.