Xiao Mingzhu, the fifth princess of Dayong, was once a child prodigy who could recognize a thousand characters at the age of three. But her extraordinary intelligence eventually worked her to death at her desk. Reborn into a new life, she decides to pretend to be foolish and spend her days enjoying food, drink, and entertainment. However, when the Northern Di army threatens the border, their envoy Huyan Shuo proposes a wager: one question for one city, demanding that Dayong permanently surrender ten northern cities. As the officials of the imperial court repeatedly fail to answer his questions, the emperor reluctantly prepares to sign away the cities. With hundreds of thousands of innocent people on the verge of becoming abandoned subjects, Xiao Mingzhu finally removes her golden bell and steps forward, determined to fight for her people.