Sun Woong, a prosecutor at the Jinyeong Branch in the southernmost of Korea introduces his workplace. The case he's working on now is a dispute between a shaman and his customer. They believe he didn't perform exorcism after being paid, but the shaman himself disagrees. He's performed in at least 21 times. As the investigation carries on, Sun Woong does recognize the shaman's abilities. But something doesn't seem right.