One is an eldest son who is in trouble and is very talented, but because his family is involved in a shocking conspiracy, he has no choice but to embark on the road of investigation; the other is a daughter of a famous family who possesses unique skills and knows a book called "Resolution of Wrongs" by heart. She laments that her family is in ruins and can only live in the market and work as a butcher; and she is the daughter of the police chief, but she is involved in a bizarre murder case and is controversial. By chance, the three young people came together, helped each other, solved eight mysterious cases in a row, and finally revealed the huge secret.