In the world of Unital Ring, the foreboding presence that has been targeting the party finally makes itself known! Elsewhere, a reunion with Seijirou Kikuoka leads Kirito, Asuna, and Alice back to the Underworld, where two-hundred years have passed since the great war. There, they meet descendants of Ronie and Tiese, as well as the new leader of the Integrity Knights. But something about this man seems all too familiar...A certain glint in his eyes reminiscent of someone dearly departed...