Jinchul Woo is a top A-class hunter and the president of the Hunter's Association - but that is a tale from another timeline. In a world where gates and magic beasts and hunters are nothing but fiction, Jinchul Woo is now a detective with the violent crimes investigation unit, and his latest cases have been... well, "strange" doesn't even begin to describe them. Criminals keep turning themselves in out of fear of being torn to pieces by some otherworldly shadow ant creatures, and his only lead is the testimony of a track-and-field coach who swears that his star athlete was spotted with said creatures. Jinchul can't help but doubt the claims; after all, Jinwoo Sung seems like a perfectly normal high school kid...