Following the defeat of Master Hand and the Stardroids, there have been appearances of crystals of Petrified Darkness that have been landing in the Cloudbreak Isles. After seeing this, Kaos wants this power to evilize the guardians of the Cloudbreak Isles so that when Mt. Cloudbreak erupts, the entirety of the islands, and maybe even the world, will plunge into darkness. Now the Portal Masters have to fight back against Kaos for a third time.
