William expresses his surprise to Kevin about the latter's position as the new priest at Stradford, who then requests William to keep his distance from him at the school. William is shocked by Kevin's suddenly cold demeanor, but acquiesces to his wish. Later that night, William and the dormitory mother, Maria Mollins, confronts three boys who broke a window. The next day, he overhears the boys planning to break into Maria's room to find something to blackmail her with, much to his irritation. While skipping boating lessons, he spots the Head Boy, Nathan Caxton, acting suspiciously around Maria's room. Shortly after, William barges into her room when he heard a crash and finds a magic circle drawn onto the floor. During the boat race, Nathan exposes his identity as a demon to Dantalion and William when he uses his power to save Maria from a broken oar flying in her direction. At night, Sytry informs William that Maria opened a portal from Hell in order to summon a demon to form a contract with it. The demon attempts to attack Maria, but she is then saved by Nathan in his demon form. Dantalion arrives and explains that Nathan's true name is Camio, a half-demon born from a human woman, one of Solomon's pillars, and a candidate for Lucifer's throne. Maria and Camio reminisce over their past and her desire to become a demon when she dies from her lung disease. Dantalion advises Camio to let Maria die as a human rather than becoming a Nephilim, and they both agree. On Maria's suggestion, Camio decides to remain in the school so he will not be alone once she is gone. Before Maria retires from Stradford to enter treatment for her illness, the three boys that broke into her room comes by and apologizes for stealing an old photo of her and Camio.
목사로 들어오게 된 세실을 보고 윌리엄은 반가운 마음에 그를 만나러 간다.
그러나 세실은 윌리엄에게 목사로서의 자신의 입장을 생각해달라며 차갑게 대하는데...
한편, 각 기숙사의 명예를 건 보트 대결에서 단탈리온은 또 다른 악마의 기척을 느낀다.
