Inyeob returns to her long-abandoned hometown to find her mother, who suddenly stopped contacting her. As she arrives at the distant island, rumors about a missing girl spread. Inyeob discovers a bloodied girl in her mother's wardrobe. The islanders are hostile towards Inyeob. Inyeob searches for clues to her mother's disappearance on the mysterious and isolated island. And she forms a bond with the girl who holds those clues.