Lin Zhifa, an expert in prison administration and well-versed in the law, was separated from her family in childhood. Years later, she is found and brought back by a prestigious family in Jinghai, who confirm that she is their long-lost biological daughter. After returning home, her older brother tries to use money to deprive her of her rightful inheritance during the division of the family estate, while the family's adopted daughter harbors resentment and repeatedly clashes with her verbally. Well-versed in the law, Lin Zhifa returns only to investigate the suspicious circumstances surrounding her mother's death. She relies on legal reasoning to piece together the clues and resolve family disputes fairly.