Hideaki, a young waiter, and his mirage Tama had lost their world because the heartless. While they were searching survivors in other worlds, they knew Alexis a keyblade carrier, who fight against the heartless and close the keyholes of the worlds. Together, they fight to protect the worlds and catch the strange man, who seem control him.

Layla and her partner Lily undertake a journey to Veldime, in order to assassinate the Overlord Zenon's Daughter. In this journey, they have to travel across to serveral netherworlds, at a time when a war has been unleashed.