The play is adapted from Ye Wenbiao's novel of the same name. During the Song Dynasty, a family of five with different personalities, including Zhao Buyou (played by Zhang Songwen) and Wen Yue (played by Bai Baihe), lived in a corner of Queer Lane in Tokyo City. Zhao Buyou was originally a clerk at the bottom of the Dali Temple. He just wanted to live an ordinary life, but his wife Wen Yue only wanted to buy a house and buy land. The family often quarreled but also had a good time. In an accident, the family was involved in the sensational Meichuan case, which started a wonderful journey of solving various unsolved cases and solving endless family problems. In the process, the family got to know and accept each other again, and each of them gained growth and worked together to overcome many difficulties. As the cases were solved one by one, all the clues pointed to the "Great Kind Man in Jiangnan". In the end, through the joint efforts of the family of five, the hypocrisy and evil deeds of the evil were exposed, breaking the chaotic situation of market monopoly and unclear official career, defending the happiness of the small family and protecting the well-being of the people in Tokyo City.