Kenkyūsha-tachi wa hinpatsu suru jishin ni yotte hakken sa reta kodai iseki o chōsa shite ori, sono naka ni Yoshii Yukari moita. Onaji koro, Haichi de chōsa-chū no wakaki seiei chīmu ga kyodaina sekizō o hakken. Yoshii kara no denwa o uketa Doi kaki wa kyūka o kotowari, isoide kichi e modotta. Musashi to tomoni Jōnan daigaku e iki, Yoshii ga sekiban no moji o kaiseki suru no o tetsudau. Utsukushī umi ga osen de nageku toki, idainaru umi no gādian ga fukkatsu shi, umi o yogoshita tsumibito o horobosu koto ni naru.
Researchers are investigating ancient ruins discovered by frequent earthquakes, among which Yoshii Yukari is present. At the same time, a young elite team investigating in Haiti discovers a huge stone statue. After receiving Yoshii's call, Doi Gaki turned down his vacation and rushed back to the base. Together with Musashi, he went to Jonan University to help Yoshii analyze the text on the stone tablet. When the beautiful ocean laments because of pollution, the great sea guardian will be resurrected to eliminate the sinners who polluted the ocean.
