A story that follows an upright goddess and a constable with a cold exterior who join hands to solve crimes and find love along the way.During the Song Dynasty, Bao Long Tu who governs Kaifeng has become known as the new 'Bao Qing Tian'. Duan Mu Cui descends to the mortal realm and establishes her own sect with the intent to vanquish demonic forces who seek to harm humans. The 4th rank imperial guard Zhan Yan receives orders to help Duan Mu Cui, thus beginning their journey against ghosts in the pugilistic world.

蓬莱上仙端木翠主动请缨管理人间异端势力，杀伐决断、霸气冲天，却在结识了启封府暖心捕快展颜后被乱了心智，有了忧愁。从强撩硬上到手足无措，从欢喜冤家到合作断案，从意见分歧到暗中保护，这一人一仙，越界暗生情愫。此时，端木翠忆起与毂阊千年前的爱恨纠葛，意外坠入沉渊之地，与展颜共同卷入一场阴谋中。端木翠坠入沉渊之后记忆全无，身份变换，身入沉渊异地的展颜义无反顾，逆天而为，誓要唤回真爱。不管是蓬莱仙界，还是沉渊九狱，天上地下，此情永不变，为爱永相随 。