Hakuoro has lost his memory after succumbing to serious injuries. But thanks to an elderly woman and her granddaughter Eruruu, he is nursed back to health. His face is covered by a strange irremovable mask and he occasionally sees beastly visions. Eruruu now cares for him as he becomes accustomed to the village and its inhabitants, who all bear strange ears (the women also have tails). Though these people venerate the forces of nature, desecration of an altar forces them to take drastic measures to preserve their lives from the wrath of Mutikapa-sama, guardian of the forest.
Descriptions taken from AniDB.net