The Pantheon are not alone. Nearly a year since becoming irrevocably tied to a giant, godlike monster, Yuki now struggles to begin a human relationship. Receiving a cryptic message from a mysterious land, she and her Pantheon are called to action in tenuous dealings with a powerful warrior who disapproves of their methods, to investigate the arrival of a cosmic terror unlike anything they've encountered before. As their fiercest battle yet begins, Yuki increasingly realizes a growing rift with her closest ally, and her own struggle between love and responsibility.