Chu Chen, a supreme immortal of the Immortal Realm, is betrayed by his Dao companion, Luo Xue, and his sworn brother, Xiao Zhan. As his body and spirit are destroyed, the Fuxi Divine Art reverses time and space, carrying his soul into a modern city a thousand years later, where he becomes the “useless live-in son-in-law” of the Lin family, the richest family in Binhai. Once the Primordial Immortal Venerable who commanded reincarnation and slew immortals and demons, he now wears a wrinkled suit to pick out potatoes at the market. He meekly takes abuse from his brother-in-law, and even the receptionist at Lin Wan'er’s company dares to withhold his visitor pass. No one knows that the man who keeps saying, “I don’t understand,” can trace the path of a wineglass knocked over at a business banquet and see the pattern of a trap formation; that he can catch Lin Wan'er with his bare hands when she falls from the twentieth floor on a stormy night; or that when his fingertips brush her waist, he is using the divine art to heal a hidden ailment within her.
Lin Wan'er discovers that the husband her family considers a burden has hidden a rival’s financial movements in a miscalculated balance sheet; that the Longjing tea he brewed incorrectly can actually dispel the demonic poison she inhaled; and that even the heat pack he brings her when she suffers from menstrual cramps is nourishing her spiritual root with Primordial Qi. Then, in the study, she sees Chu Chen accidentally knock over a vase, only for a spiritual artifact sealed for three hundred years to fly out of it. As he crouches to pick up the shards, golden runes leak from his palm: the long-lost “Fuxi Divination Art” of the Immortal Realm.
When Xiao Chengyu, the young marshal of Jiangbei, enters Binhai with a murderous aura, and the Frostbell at the neck of Luo Qingxue, the medical university’s campus beauty, resonates with Chu Chen, the live-in son-in-law who keeps pressing the wrong buttons in the elevator finally finds his name on the Lin family’s genealogy in the ancestral hall: he and Lin Wan'er were promised to each other in childhood.
