Jiang Luyi, a modern woman, transmigrates into a book as Su Ruan, the vicious supporting female character who dies early. The original Su Ruan intended to approach Shen Zhaoye, the male lead of the original novel, but accidentally enters the room of Yan Chen, the villain, and injures him with a blow to the head. Desperate to stay alive and escape, Su Ruan pretends to be in love with Yan Chen to get through his layers of probing and suspicion. Back home, she must deal with her biased mother and the schemes and provocations within the household. Yan Chen is cold and ruthless to everyone else, but becomes increasingly possessive and obsessive toward Su Ruan, often pleading for her affection with reddened eyes and a show of vulnerability. Whenever Shen Zhaoye approaches her, he erupts with jealousy. Su Ruan fears his unhinged side, yet is moved by the way he alone protects her, leaving her torn between fleeing and staying. Their relationship remains an ambiguous push and pull as crises in the prince's manor and the inner household continue to unfold.