When 12-year-old Seth is left without a home, he must go to live with his grandparents on a farm in Utah. Being a city kid, life is tough, getting up before sunrise to do chores and having full responsibility of learning to drive a stubborn old tractor. But, adventure beyond his wildest dreams awaits the boy! A rogue grizzly bear attacks and kills the neighbor's sheep, so Seth's grandfather fears that his own family's livestock will fall victims to the marauding predator! Seth and his grandfather decide they must ride together by horseback, into the high mountain country, to round up their grazing cattle before the ruthless grizzly finds them. When grandfather is attacked without warning by the giant bear, Seth must confront man-sized danger to save his injured grandpa.