Sometime after Crystalized, a phenomenon known as "The Merge" combines Ninjago with the rest of the sixteen realms of creation, introducing new threats, and causing chaotic aftershocks called Mergequakes. Years later, Lloyd befriends two civilians: Arin and Sora, the former, a fan of the Ninja, and the latter, a technopath from the totalitarian kingdom of Imperium. The three are tasked with finding the rest of the scattered ninja and combating the Claws of Imperium, who covet Source Dragons in order to drain their elemental energy as a resource.