Many know the story of Medusa. Few people know that variations of these creatures exist in Tsushima. They are half-generated girls with the head of a snake who, in other parts of the world, live in places where the water echoes among the stones covered with moss. On the Tajiri promontory lives Isonna: terrible in the tangled appearance of snakes, one day she asked her poisonous hair to bite her eyes. Blindness made her harmless and she was happy about it.