With every actor in place, Guren Izaya looks to begin his conquest of the heart of Mu: the grand spiral tower Babel. In it lies the ultimate power to reshape the world, which he now has the power to grasp. Flanked by both his trustworthy allies and collaborators, he prepares to both embrace his destiny and reunite with the girl who's the impetus of it all.

Kazuki and the rest of the team are left with little time to reflect and head straight to Elysium Research Complex. However, standing between them and Euphoria is a familiar face, her own heart clouded with uncertainties. Attracted by the gathering of spiritual energy, a wild card also makes his presence felt.

Friends and foes alike converge in the epicenter of the first Mu incident!