After a car accident, modern girl Yun Wei transmigrates into a novel and becomes the vicious, cannon-fodder princess commandery with the same name in a male-oriented power fantasy novel. She is also the wife whom the male lead, Gu Changling, is destined to eliminate. Her original self is notorious for her misdeeds and will be sentenced to death by him within three months. To save her life, Yun Wei takes the initiative to change the plot, resolve crises, and even deliberately helps him take concubines to ease his murderous intentions. However, Gu Changling is actually a strategist serving Prince Qi, lying low while plotting to seize the throne, and her unusual behavior has already stirred his emotions. One night, Yun Wei discovers his whereabouts and is drugged by him as a test, yet she would rather die than yield. Just then, Duke of Wei arrives in the middle of the night, and the two begin a battle of wits in which whoever falls in love first loses, all while pretending to test each other.