A long time ago, the Earth was plagued by the Demon King Beasts, monsters that wreaked havoc across the globe until the Ultra Warriors sealed them. Time passes... To protect the Earth from the revival of Demon King Beasts, Ultraman Orb descended from beyond the galaxy, taking the form of young traveler Gai Kurenai. In order to defeat the resurrected Demon King Beasts, Gai utilizes the Orb Ring and a pair of Ultra Fusion Cards.