Acting as a special correspondent for the Daily News, Jun travels to Japan's base at the South Pole. Once there, he learns about the mysterious disappearance of staff member Nomura three years ago, an incident that is made more intriguing by a passage in Nomura's journal which refers to the unknown entity, "Peguila". Yoko Kuhara, staff physician and Nomura's fiance, is also stationed at the base and remains optimistic that they will find the missing Nomura. Soon, strange disturbances begin to take place, as well as a dramatic drop in the region's temperature.

A young boy named Taro develops a curious preoccupation with his pet turtle named Gameron, to whom he constantly encourages to grow. After getting into trouble for bringing his turtle to school and neglecting his studies, Taro winds up in the company of two bumbling gangsters as they flee from the authorities. While hiding out in the sewer, Taro is delighted to find that his turtle has suddenly grown to 99 cm in length. The sight of the giant turtle, however, frightens the gangsters into the welcoming arms of the police. Assuming that Taro had been kidnapped by the two thieves, the authorities return to collect the boy, who is nowhere to be found.

A strange occurrence at the zoo has caused the animals to disappear and has left the zoo keeper near death. Gasping his last breath, the dying man murmurs, "I saw a bird".

At a Tokyo airport, a sudden, mysterious cold wave causes an aircraft to crash and grounds the other planes. A strange black cloud descends on Tokyo and from within it, emerges the monster Peguila.

One day at a construction site, a group of children were finding valuables in the dirt when a man on a bulldozer ran over their bikes. When the children went to recover them, one of them named Kaneo Kaneda (in Japanese, kane means money) found a small object that had a jingle sound much like money in it.

Jun, Ippei and Yuriko investigate a hillside accident involving a truck that was transporting a uranium capsule. After rescuing the drivers, they learn that the monster Pagos had surfaced from underground, following the appearance of a mysterious rainbow, and caused the accident.