After serving his military duty, Jung-hoon, who has never had a girlfriend, returns to college. He has a secret crush on Eun-ji, a member of the school's paranormal activity research club called Mysteria, in which he also belongs. One day, Jung-hoon meets Ji-sun, a virgin ghost, by chance, and Ji-sun asks him for help with her Scare tests, the exams that she needs to pass in order to be reborn. In return, Jung-hoon makes an arrangement with Ji-sun to help him score points with Eun-ji. While trying to help each other's problems, the two run into disagreements, but their feelings for each other grow deeper as time passes.

짝사랑 하는 그녀와 성공적인 연애를 위해 가입한 심령동아리에서 자신도 모르게 귀신을 볼 수 있는 능력을 가진 모태솔로 ‘정훈’. 인간환생 시험을 앞둔 처녀귀신 ‘지선’을 만나며 목적달성을 위한 모종의 계약을 맺는다. 이승도 저승도 모를 은밀한 거래를 시작한 둘은 곧 서로에게 미묘한 감정을 느끼게 되는데…!!