The "Twin Star Exorcists" are fated to produce the child prophesied to end the war with the monstrous Kegare... But can Rokuro and Benio get along for five minutes, let alone save the world?

Rokuro's Spiritual Guardian appears to be someone it can't possibly be. Then, despite warnings, Guardian Shimon recruits the Twin Stars to help him rescue a young exorcist in training. But why does Seigen add his daughter, newbie exorcist Mayura, to their team...?