In 1991, science fiction writer Kenichiro Terasawa is writing a book about Godzilla and learns of a group of Japanese soldiers stationed on Lagos Island during the Gilbert and Marshall Islands campaign. In February 1944, while threatened by American soldiers, the Japanese soldiers were saved by a mysterious dinosaur. He theorizes that the dinosaur was subsequently mutated into Godzilla in 1954 after a hydrogen bomb test on the island. Yasuaki Shindo, a wealthy businessman who commanded the Japanese soldiers on Lagos Island, confirms that the dinosaur did indeed exist.