Ravi is a demon. Nobody can see him, hear him, or feel him. He wanders aimlessly around the city of Seoul and ends up at a college campus, where he encounters a quiet music student around his age. The kid would be his best friend if he could only communicate, he was sure. Until, one day, the kid turns to him, looks him right in the eye and huffs 'Why are you following me?'

Taekwoon is a freak. He's been that way since he was born and will be until his dying day. His parents think he's crazy, his professors and peers avoid him, and the local priest thinks he's possessed by Satan... Maybe he's right.