The film begins in the past where a gang of pirates commandeer a ship and kill everyone on board. Three years later in a seaside village, a Catholic priest (Masumi Okada) has offered shelter to Saeko (
Kikko Matsuoka) as her twin sister, Yoriko (also Matsuoka) has disappeared with her new husband at sea. Saeko later scuba dives with her boyfriend, the couple find a group of submerged human skeletons, chained together at the ankles near the ocean floor. That night, a ghost ship appears in the mist offshore as a voice from the ship calls out for Saeko. == Cast ==