There was a time when mankind and monsters coexisted in peace, but The Great Disaster put an end to that era. The world changed radically, with all the planet's monsters disappearing in an instant, leaving behind only jewels that radiated tremendous energy. This energy source became known as jewel power and enabled the survivors to revive their civilization. Now, the peace achieved through jewel power has been endangered by a new threat. Strange Abominations have mysteriously appeared and unleashed legions...