"Mamushi finds that she was deceived by her teacher and unwillingly helped him to awaken the Impure King. She rushes back to the Myoda asking to help Tatsuma and Rin decides to go to his aid. However, for some reason he becomes unable to draw his blade and he is locked in a special prison awaiting execution by the Vatican's orders. Rin's classmates learn about his situation and manage to break him free, and once again reunited, the Esquires join the Myoda to confront the Impure King, whose poisonous miasma threatens to ravage the city of Kyoto."--Wikipedia.