Luo Shu (Hu Bing Qing) was sold to the Qin family and later went to a brothel as a child after losing her parents in a fire. Since then, she has tried to escape, but a mysterious force prevents her from leaving. One day, with the help of County Commissioner Han Mu Zhi (He Peng), who is attracted by her intelligence and courage, she is finally able to escape. Recognizing her observation and wisdom, Han Mu Zhi joins her in solving a case where a woman seeking God's blessing for pregnancy is tricked and hidden by a man who pretends to be a disciple of God. Due to the shame associated with such crimes, no victim comes forward. Luo Shu plays a key role in bringing down the criminal organization, then she asks for help in restoring her status as a commoner to escape the lowest echelons of society.