Kim Muryeong, the youngest of a famous exorcist family. Raised with the love of his entire family, he was considered a genius who only comes once in a century. "Muryeong, let me ask you one favor.” Such Muryeong started working as a simple exorcist after entering high school. Although it was more of a problem-solving job than an exorcist, there was no request that Muryeong, who helped and looked after anyone, could not accept. However, even Muryeong had one person he avoided… “Ki Hwanyoung?" Tall and handsome. Ki Hwanyoung, who had a scary vibe and was rude and had no friends. One day, that Ki Hwanyoung came to see Muryeong. “My shoulders are heavy these days.”