There once was a place where we had all the desires of our hearts. We walked with God and had perfect communion with all animals. There the animals weren't our pets, they were our friends. We loved them, and they loved us. But we brought on the plagues of sin and death, and everything changed. Eden fell away and was hidden from view. But Eden never left. It has been with us from the beginning. And sometimes, a dweller of Eden leaves to walk the Earth, but the Earth can be a deadly place for amazing animals.

Rancher Sam McLeod and Libby, his fifteen-year-old daughter, ride deep into the Montana wilderness and witness a giant grizzly bear brutally killing a mother grizzly defending her cub. Libby rescues the cub, and they head back to their farm. But Kaiyo is no ordinary cub, and he is pursued both by his mother's killer and by a secretive tracker who was sent to guide the mother bear back home. Events force the McLeods to realize they are confronted with creatures that think like humans, and in doing so, Kaiyo and his new family become willing combatants in the ancient war between unseen nations.