Kingdom Hearts II begins one year after Kingdom Hearts: Chain of Memories. Sora, Donald and Goofy have been asleep for the past year to regain their lost memories. Meanwhile, Roxas is trapped in a virtual simulation of Twilight Town created by DiZ so that Roxas, the Nobody of Sora,[20] may merge with his original self to restore Sora's power.[21] This is done as part of DiZ's revenge on Organization XIII