A girl named Elez had her heart taken away by the heartless. Her parents, and sister also. So then Elez meets a group called 'Organization XIII', a group of nobodies, and then she becomes 'Zelex'. Nobodies can't actually 'feel', right? But Zelex can feel anger, fear, sadness, and more. She discovers more about herself when she meets a girl with a cat mask. And Zelex finds that she has something, that no one else have.