The true deity Song Qingwan is banished to the mortal realm for her cold-hearted nature and becomes the abandoned daughter of the prime minister's household. When she is on the verge of death, she encounters Lu Yuan, a frail regent prince. By borrowing his imperial purple aura, she restores her divine powers and offers to cure his poison in exchange for his protection. After returning to her family, she uses fate-changing magic to fight back against her relatives and cures the leg ailment of Imperial Physician Zhang. When the emperor falls critically ill, she calls him Goudan and uses her magic to bring him back to life, earning his reverence and recognition as an immortal sovereign. The crown prince covets both the throne and her extraordinary abilities, repeatedly plotting against her. As Lu Yuan and Song Qingwan face one crisis after another together, they gradually fall in love. In the end, they join forces to defeat the crown prince and the Ghost King. Lu Yuan ascends the throne, while Song Qingwan becomes his one and only empress, and together they rule and protect the empire.