In a serene meadow, Chirin, a young lamb, and his mother find solace within the safety of their flock's protective fence. Their days are filled with playful frolicking and feasting on sweet clover. Yet, tranquility is shattered by the brutal ambush of a wolf named Wor, claiming Chirin's mother's life. Lost in grief, Chirin vows to seek vengeance by taking on the form of a wolf, oblivious to the sacrifices this path may demand.