Su Mianmian, the daughter of a wealthy merchant, agrees to marry Prince Qi by imperial decree, hoping to seize the opportunity to marry a handsome man at a bargain. Rumored to be disabled and mute, the prince was allegedly left crippled and unable to speak after an assassination attempt. After their wedding, Mianmian lets her imagination run wild, coming up with all sorts of amusing interpretations of the prince's behavior. With her extraordinary spending power and quick wit, she repeatedly puts arrogant rivals, scheming former lovers, greedy relatives, and other villains in their place. As she expands her business ventures and navigates one crisis after another, she takes the capital's commercial world by storm. Working in perfect harmony with Prince Qi, who is secretly concealing his true abilities, she joins him in protecting their family fortunes and building a happy life together.