The snow-white tower of the Central Cathedral is a symbol of the power of the Axiom Church. Having enlisted the help of the wise Cardinal, who lives in a library cut off from the world, Eugeo and Kirito head to the top, hundredth floor of the cathedral, where the High Priestess Administrator is waiting for them. Eugeo is heading there to transform Alice from an integrity knight into who she should be; and Kirito to save the Underworld from destruction. But on the ninety-ninth floor, Eugeo appears in front of Kirito and Alice wearing the armor of an integrity knight and with an icy glint in his eyes. Eugeo draws his blade without any hesitation, and Kirito is forced to defend himself. Is it really time for the battle that he foresaw, even when he heard the distant rumble of thunder on the day the journey began? Will Kirito's desperate pleas reach Eugeo's soul? The end of the “human world” sub-cycle of the “Alicization” cycle!