该剧以流传在宋朝时期的“逆水寒剑”为线索,讲述了宋朝的八大寨主保护“逆水寒剑”的江湖故事。。Detective Ryoo Yi Jae lost his beloved son in a hit-and-run accident. Without finding the criminal, the statute of limitations passed and the family collapsed. He was transferred to Namwon after drinking alcohol to soothe his exhausted daily life. When he was about to live a new life from meeting Eom So Hyun, he ran into Im Hak Chon by chance, the murderer of his son.。钱子楼为了躲债,躲到了精神病院,可他亲眼目睹了楚大夫死在了自己面前,并发现这个医院闹鬼,钱子楼和护士婉清不相信是闹鬼,他们展开了调查,他们怀疑是左院长害死了楚大夫,可没想到很快左院长也遇害了,、左院长、楚大夫和护士小美都意外的被害,他们的手里还拿着一把古锁,夏雪吟大夫也被人差点害死,一件件惊悚诡异的事件在医院上演了,医院里闹的人心惶惶人人自危,婉清也陷入到了危险中,到底谁是凶手?。