Being the new girl is tough when you have to keep the fact that you're a yomul hunter a secret. Demons with human faces, yomul, run amok in Seoul, and it’s up to Seul Park and her father to destroy them. But her charmed life as a regular high schooler comes under threat when a mysterious and powerful yomul discovers Seul’s biggest secret—she’s half-yomul herself. To make matters worse, he plans to use the cutest boy in school to lure her out of hiding.