Riverside Code at Qingming Festival tells the story of a family of five with very different personalities living in Bianjing City during the Song Dynasty. The husband is a petty official who only seeks comfort in life, while the wife wants to buy a decent mansion. Due to an accident, the family is involved in the sensational MeiChuan case, which opens up a marvelous journey of solving all kinds of unsolved cases while solving the family's problems.