Jun travels by ship to investigate the mysterious disappearance of his old chum, Nomura, a member of a Japanese Antarctic Winter Party. Nomura's cryptic last message, "Peguila is here," beckoned Jun to Antarctica. Team Leader Amada and Jun eventually find the body of Nomura under a sheet of ice, guarded by his faithful dog, Saburo, who survived by eating native moss. The team discovers that the moss Saburo subsisted on is enriched with Peguimin H, a substance that is poisonous to Peguila. As the monster approaches their outpost, a rocket loaded with the Peguimin H is used to drive back the monster, though it flees to fight another day.
南極基地へ向かう船に同乗した万城目。彼らを待ち受けていたのは、異常な寒波と怪現象だった。そして、3年前に失踪した隊員の手帳には「ペギラ」という不気味な文字が記されていた。
