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?

While Rokuro and his clan expend the last of their spiritual power battling vicious Shiromi, Arima attempts to prevent Yuto and two other powerful Kegare from invading the human world. But he can't be in three places at once--or can he?