After his grandfather, a shaman, passes away, Yoon Dam suddenly starts seeing ghosts. In order to not see ghosts, he needs the power of a goblin. One day, Lee Do Han, who claims to be a goblin, appears in front of Yoon Dam. Every time Lee Do Han tries to harm Yoon Dam, he gets wounds one by one on his body, and in this strange situation, Lee Do Han becomes interested in Yoon Dam. “Do you really want to be my private tutor?” The two people who are caught up in strange events end up together for each other’s purpose…