Marty Stouffer is studying wildlife in a remote Colorado wilderness. One spring day, he comes across the tracks of a Grizzly Bear -- thought to be extinct in the state -- and he follows and meets face-to-face with a magnificent male Grizzly. Excited by his discovery, Marty adopts a female Grizzly cub from a zoo. He and Griz share a cabin as Marty teaches her how to survive.

Over the summer, the adventurous cub encounters many other creatures, among them a hungry Cougar. As winter approaches, Marty digs a den for Griz, and while she sleeps, he goes off to observe wildlife which does not hibernate. In April, Griz emerges from her den, and must learn one last lesson -- to fear humans, even Marty. This separates man and bear forever.