One of Ferre's guard ships has disappeared for a while. As soon as the ship was found, 115 members on board the ship completely disappeared. No traces of its existence on board the vessel was not found. Masato's sister works on Ferre, and he was charged with bringing him supplies for the next job to explore this mysterious ship that came back without his team. He meets a beautiful girl named the Uto in the company, who also had a brother who worked on Ferre and disappeared inside the ship. Now Masato and Uto must go on a mission to reveal the secrets of an unknown island, where there was a missing crew.