Hyde, with his sidekick, Sakura, are treasure hunters. They are staying in a small village while they look for their treasure, the legacy of the old world! The treasure lies inside a cave, and Hyde finds a lot of action during his search: fighting off monsters, and saving a beautiful, mysterious treasure-hunter. One day during his search, Hyde comes across a sealed door.

An amulet that a dying man gave him unexpectedly opens the door. He enters and finds a naked girl encased in ice! Suddenly, the amulet frees the girl from the ice, and she falls into Hyde's arm, unconscious. Who is this mysterious girl, and what does she know about the legacy of the old world?

Hyde rushes her to the doctor, only to find that this girl, Youra, has lost her memory! Hyde is convinced that she is the key to finding the treasure, be he also wants to help her... Starting with his spontaneous, lust-filled encounter with Manatee, the sexy priestess, to his passionate romp with Shizuki, the town doctor, Hyde still finds plenty of time to fill his adventures with hot, dripping sex!