Warned that it is haunted, a skeptical young couple buy a rundown yacht and fix it up to be their home-on-the-sea, only to slowly realize that it really is haunted.

Jiromaru (Kinnosuke Nakamura) investigates the dark "Ghost Ship" in search of his father. Meanwhile, Princess Yuki (Yumiko Hasegawa) and Chacha (Eiko Maruyama) are kidnapped by pirates ...