Four years have passed on Destiny Islands since Sora, Riku, and Kairi returned from The World That Never Was. A powerful new villain with dark aspirations and the ability to raise nobodies from the void has attacked Disney Castle and the King; Donald and Goofy have gone missing. Were they taken prisoner or did they chase after the dark villains? A message arrives in a bottle for Sora and his friends, urging them on a new quest, but the villains appear to be after the same thing. The keyblades, the power worlds, and the crossroads of dark, light, and nothing collide...