An elderly woman is summoned back to Korea where she spent her youth. Memories overwhelm Suni of a feral and mute orphan who the family took in. Young Suni is determined to tame the "wolf boy" and teach him to live among people. In return, he repays her with unparalleled devotion. When a threat to Suni brings out the boy's bestial instinct, he becomes the target of the villagers' fears. To save his life, Suni abandons him, but promises she will return. Does he still wait for her?