Kingdom Hearts: Chain of Memories synopsis

The end of Kingdom Hearts left Sora at a crossroads. Chain of Memories tells of his choice there, and the consequences - ?Ahead lies what you seek? but to claim it you must lose something dear.? The masked figure speaking those words leaves him with only one path to follow - to a castle haunted by seemingly endless emptiness. As Sora struggles to remember his lost friends, he must now traverse the chain of his own fragmented memories. With what results?