A mammoth gorilla appeared in the jungle of New Guinea and attacked the inhabitants. Babel II, who was invited by Yomi, meets a victim girl, Ami, and his younger brother, Pero, who was in danger of blindness due to the attack, and a Japanese doctor, Shirakawa. In fact, he was a former teacher of Shirakawa and Yumiko's father, and here he was a well-known doctor called Schweizer in Japan.
