Ten years have elapsed since Opa-Opa restored peace to the Fantasy Zone™. Now history is repeating itself, and the planets that make up the Fantasy Zone once again find themselves attacked by the mastermind of the Nenon planet forces. This mastermind is secretly constructing a huge fortress in the Fantasy Zone and aims to put an end to their ambitious plans. Just as he did ten years ago, Opa-Opa must do battle to save the Fantasy Zone!