Having lost her family in a fire and with nowhere left to go, Yuri meets Shiro, who is on the run from Section 13. Shiro is brought back by the exorcists pursuing him, and he makes a request of Mephisto. Meanwhile, Yuri is taken to the Asylum, a school for exorcists-in-training, due to her ability to see demons. As he watches the two grow up, Rin witnesses the true nature of the Asylum and Section 13.