Sanda and his ragtag group of friends begin to unravel the dark secrets behind a group of students with a taste for blood. As Sanda wrestles with his instinct to grant children's wishes, the shadowy enemy's dangerous manipulations push his powers to the brink, and affect the control he has over when and how he transforms. Shiori's own investigation leads her to the sinister forces that pull them into a conspiracy that threatens not just their mission, but the fragile ideal of Christmas itself. Betrayals emerge, moral lines are blurred, and Sanda's emotional resolve is tested like never before.