In the 1970s, {Su Wan} was forced to marry into the Gu family on behalf of her fragile sister. Faced with the troubles made by the Gu family's relatives and the blood-sucking of her natal family, she acted decisively, leaving her selfish relatives speechless and cutting off her natal family's thoughts. Gu Yan, the captain of the street security team, thought her to be a cold "substitute" at first sight, but she took action many times: seeking justice for bullied students, standing up for bullied neighbors, and even the gangsters were brought into submission by her. Su Wan said she was "meddling in other people's business", but acted faster than anyone else; Gu Yan protected his wife passionately, and the two went from misunderstanding to tacit understanding. In an era full of fireworks, Su Wan used her strength to become the "Sassy Queen" that everyone envied. Even the label of substitute marriage became her medal!