6,000 years ago, twelve-year-old Torak and his guide, a wolf cub, set out on a dangerous journey to fulfill an oath the boy made to his dying father--to travel to the Mountain of the World Spirit to destroy a demon-possessed bear that threatens all the clans.

When Bane is killed by the Soul-Eater Thiazzi, Torak sets off into the Deep Forest with his foster father and Renn to avenge his friend's murder, but they find themselves in the midst of a war between the Deep Forest clans.