"Yhwach's invasion of the Soul Society has led its defenders to make some strange alliances, as Ichigo and his friends find common cause with some of the Arrancars. Meanwhile, Soul Reapers who normally wouldn't have anything to do with each other now fight side by side as Kenpachi and Mayuri take on a truly monstrous Quincy. And because war brings changes to us all, Mayuri's dutiful daughter Nemu is compelled to act in defiance her father--even if it becomes the last thing she ever does."