Our heroes dive deep into Andrew Ryan's underwater dystopia in search of the next missing power. Secrets will be revealed, alliances will be formed, and a new evil shall arise, one that Sora and the others will find most heartbreaking. Who will survive?

Ventus is faithful and loving to Elizabeth even after what she did to the man who've help them so much. Master Xehanort had his golden eyes on her. Ventus was taken away and she went to search for him... and to destroy The Seeker of Darkness. But when she found Ventus, he can't remember her. She follows Ven during his adventures while being chased by Vanitas and Master Xehanort.