Su Jinxiu, the illegitimate daughter of the Minister of Rites, is forced to take her elder sister’s place and marry Prince Jing, who is rumored to be a bloodthirsty brute.
On her wedding night, she unexpectedly gains the ability to [switch faces] with another person for one hour.
Her sister mocks her for being doomed to a life of widowhood. Su Jinxiu switches faces with her and sneaks off to meet the man her sister loves, ruining their relationship. When the Noble Consort makes things difficult for her, Su Jinxiu takes on her face and goes before the emperor to “request” a cut in her allowances, cutting off her source of money.
Later, the noblewomen of the capital realize there’s always a “traitor” in their circle. Meanwhile, the dreaded Prince Jing stands outside Su Jinxiu’s room every night, his voice hoarse as he asks, “My lady, whose face would you like to wear when you look at me today?”