During the Northern Song Dynasty, a family of five with distinct personalities lived in Bianliang City. They became involved in the plum ship case, leading them to solve mysteries, confront family issues, thus strengthening their bonds.

During the Xuanhe period of the Northern Song Dynasty, a family of five with very different personalities, including Zhao Buyu and Wen Yue, lived in a corner of Queer Lane in Bianliang City. Zhao Buyou was a clerk at the bottom of Dali Temple. He just wanted to live an ordinary life, but his wife Wen Yue only wanted to buy a house and land. The family is often noisy but also happy. In an accident, the family was involved in the sensational plum ship case. As each case was solved, the family each showed their talents and embarked on a wonderful journey of solving the case, solving endless family problems and growing up. In the end, the family of five re-recognized and accepted each other, and each gained their own growth. Together, they exposed the hypocrisy and evil deeds of the mastermind behind the scenes, safeguarding the happiness of the family and the well-being of the people of Bianliang.