A kid spots a killer's face in a wanted poster and draws it from memory, then that killer spots her name on the sketchbook. The movie turns a moment of civic duty into a child running for her life, where being helpful becomes the thing that marks you as prey. Nube arrives not as a guaranteed savior but as a man racing against time to stop something that's already hunting, already knows what she looks like, already has her ribbons memorized.
Kumiko spots a familiar face in the local park: a man whose mugshot she'd sketched weeks ago for a police assignment. Before she can alert anyone, the criminal notices her drawing and catches sight of the red ribbon in her hair. When police corner him, his car plunges into a seal, and something far worse than capture claims him. A demon seizes his body, transforming him into an instrument of supernatural vengeance. Now it hunts for a girl with red hair accessories whose name starts with K.I., and Kumiko realizes she fits that description perfectly. Her only hope rests with Nube, her teacher and reluctant exorcist cursed with demonic power of his own. As the possessed killer tears through the city searching for his target, Kumiko and her friends find themselves trapped between a human monster and something inhuman wearing his skin. What begins as a chance encounter becomes a fight for survival, forcing Nube to confront both the demon's hunger and his own dark nature. Horror and comedy collide as an ordinary school day turns into a nightmare.