Kingdom Hearts Re: Chain of Memories

Even though the worlds are now safe, Harmony still continues on her journey. This time she's determined to find her friends, Riku and Madison, her father, Kratos Aurion, Chibiterasu's mother, Amaterasu, and King Mickey. On the way, however, Harmony, along with Asch, Luke, Mieu, Chibiterasu, Donald and Goofy, comes across a bizarre castle, Castle Oblivion, where to find is to lose, and to lose is to find. In order to find the people most dear to her, Harmony must first lose her memories in order to accomplish this.
Meanwhile, somewhere in the lower parts of Castle Oblivion, Madison and Riku face their own problems. While Riku tries to overcome the darkness that still clings to his heart, Madison tries to move on from her dark past, still haunted by all of the horrible mistakes she made when working with Maleficent.
Read to find out what happens to these group of friends.