Shen Zhaoyue and Shen Qingyi are twin daughters of the Marquis of Jing’an. The elder sister Shen Qingyi was prophesied at birth as an auspicious star, doted on by the whole family despite her constant poor health. A Taoist master claims the younger sister Shen Zhaoyue, born at the most yin hour, is a cursed evil star whose presence worsens Qingyi’s illness. He says torturing Zhaoyue will ease Qingyi’s pain, and killing her on their 18th birthday will cure Qingyi completely.
Shen Qingyi pretends to promise Zhaoyue freedom at age 18, but instead has her brutally humiliated and killed when the day comes. Filled with bitter resentment, Zhaoyue’s spirit attracts a Green Hill fox immortal, who grants her a second life in exchange for giving up reincarnation forever. Reborn, Zhaoyue gains secret fox magic that makes her irresistibly charming and alluring.
The immortal tells her she can reverse her cursed fate only by making Crown Prince Xiao Yunzhan — Shen Qingyi’s beloved husband — fall in love with her.