Takuya comes into contact with his past, a failed mission at the Light of Hope Academy for Disabled Children. As they step inside, Takuya and the others fall into another pocket of space. They have one goal, find evidence to bring down Lacuna.

Yuki and Takuya have to make a choice. Eiji and Kikyo try to stop the two of them from going to Lost, by telling them the true dangers of the place. While, Taiyo has begun to move into the final stages of his plan to complete the portal.