22-year-old corporate slave Lin Wan dies while saving someone, and the King of Hell grants her return to life. She chooses the "face-slapping" skill, which allows her to slap people across the air and force them to speak the truth. Transmigrating as the legitimate daughter of the prime minister, she slaps her way through corrupt officials, inner court secrets, and treason cases, transforming from a noble lady into the Princess of Anguo. Opening teahouses, running a women's academy, and refusing to marry, she has money, leisure, and capability, living carefree until eighty. With big slaps in hand, the world is mine.