Na Woo Soo is the epitome of high school perfection: he comes from a wealthy family, is extraordinarily handsome, is the favourite pupil of all the teachers at Seoul’s most prestigious high school and, with his outstanding marks, is always top of the class. But his life is about to change: the pupil with the lowest marks in his class is found dead in what initially appears to be a suicide, and a girl named Ga Doo Shim transfers into his class. Ga Doo Shim would like to be just an ordinary schoolgirl, but she is destined to become a powerful shaman who hunts evil spirits. The only problem is that she struggles to see spirits, whether they are evil or benevolent. His grandmother once told him that if he managed to survive his 18th year, he would be able to lead a normal life. But the death of the student with the lowest marks soon turns out to have a supernatural connection. Furthermore, he discovers that Na Woo Soo has suddenly acquired the ability to see spirits. Together, they realise they have the power to fight the forces of evil, which now threaten to invade the school. But could their partnership in defeating the ghosts one day blossom into a love story?