Su Qingyue, a top-notch psychotherapist, suddenly dies from overwork and finds herself transported into a novel as Gu Yunxi, an illegitimate daughter of the Gu family forced to marry in someone else's place. She is compelled to marry into Prince Jing's residence to bring good fortune to Prince Jing, Zhao Heng, who is rumored to have only a short time left to live. Zhao Heng is suffering from a parasitic curse and pretends to be frail and vicious while secretly investigating the truth behind the late emperor's murder. Gu Yunyao, Gu Yunxi's legitimate elder sister, has been reborn with memories of her previous life and has sided with Prince Qi. She repeatedly schemes to harm Su Qingyue, desperately hoping to rewrite her fate.