The harrowing battle against the White Whale has finally been won, meaning Subaru can focus on returning to the Mathers domain. This time, with soldiers from the expeditionary force as well as Julius at his back, he is ready to fight the Witch Cult raiders who are under the command of the Archbishop of Sloth, Petelgeuse Romanée-Conti!

In order to thwart the madman's plot to inflict unspeakable tragedy upon Emilia and everyone else Subaru cares about, Subaru uses what little he has learned from Return by Death. Realizing that he can't save them alone, Subaru will beg, plead, and cooperate with whomever it takes to defy fate itself!