When Ventus wakes up in the Chamber Of Waking he finds himself with a hooded man. When the man creates a portal he disappears through it and Ventus follows him through. Though the portal he finds himself near a town at night with a heart-shaped moon shining upon him. He goes in search of his friends Aqua & Terra. But more importantly, he goes in search of the the x-blade. However, Ventus is being watched. He will need help doing this and to find the hooded man. Luckly he is near a town that will gladly welcome him and throw him a party

This takes place near the end of Kingdom Hearts 2 (When you go to the world that never was) and is based of Birth By Sleep.