Satoru Gojo and Suguru Geto form an exceptional duo. Together, they are unbeatable! To such an extent that they are entrusted with a mission of the utmost importance: to protect Riko Amanai, the future receptacle of the master of the barriers, until she joins him in order to be assimilated. For the two students, nothing easier! But, while the small group thinks that it has finally achieved its objective, a killer with extraordinary agility and strength manages to defeat Satoru's vigilance... Would the prodigy of the world of exorcism have found an opponent at his height?