Reporter Goro Maki stumbles upon scientists conducting weather experiments on Sollgel Island in the South Seas. He discovers the island is inhabited by giant mantis and a woman named Saeko who's been cast away since the death of her father. The pair soon find a helpless infant monster that Godzilla must adopt and learn to raise as one of his own.

Manga artist Gengo Odaka lands a job with the World Children's Land amusement park only to become suspicious of the organization when a garbled message is discovered on tapes. As Gengo and his team investigate, Godzilla and Anguirus quickly decipher the message and begin their own plan of action.

At a carnival called the Garden of Evil, a man is murdered, apparently by a gorilla...or someone in a gorilla suit.

Franco Columbo stars as Interpol operative Franco Armando - code name Beretta - who's forced out of retirement to avenge the cold-blooded murder of a cop. The killer's trail leads to Franco's hometown on the beautiful island of Sardinia, where drugs are turning the peaceful village into a hell hole. The sinister druglord has a sadistic welcome for Franco: the kidnapping of his best friend's beautiful daughter.