Ha-un the son of Yeongwol Mun-joo, spends his childhood bickering with Baek Ri-Geon, the boy his father brought. Rather than a friend, the relationship between the two seemed like bad friends. One day, Yeongwol Mun-joo Gate was destroyed by a magic attack, However, Baek Ri-Geon, who was believed to be dead, is alive, and he becomes a source of magic.