Park Seon A, a young shaman who is losing her spiritual powers due to a lack of yang energy, discovers that Lee Jae U, a wheelchair-bound billionaire heir, possesses overwhelming yang energy but suffers greatly because of it. To secure his family's conglomerate and to help Seon A continue her life as a shaman, the two enter into a contract. With his yang energy, Seon A regains the power to perform spells and repeatedly overcomes dangerous situations, while Jae U gradually recovers the use of his legs thanks to her. Together, they defeat Jae U's villainous uncle and Mi Gyeong, Seon A's aunt and a corrupt doctor, before falling in love and choosing to spend the rest of their lives together.