The crown prince, Touya, or as he has chosen to call himself, Dabi, had gotten into an argument with his father, Kind Enji. Therefore, he decided to sneak out at night. He had taken his horse and ended up going to the forest. Unfortunately, he got lost and eventually attacked by some wild beasts. The last thing he remembers from before passing out was a moon wolf appearing in the distance and slowly approaching him.

Dabi opens his eyes and finds himself in a room he does not recognise.