Three months after genius forensic pathologist Shen Tao and police captain Zhou Ye solved the "Dark Crow Case," an unidentified female corpse with a butterfly mark carved into her shoulder was found in the outskirts of Linjiang. The note beside her was exactly the same as one from an unsolved case three years earlier. The case not only exposed a criminal organization led by psychology professor Bai Keyu, but also revealed Bai Keyu's troubled past and the crimes committed by the group's members. During the investigation, Shen Tao was imprisoned by Bai Keyu and injected with memory-loss drugs, while Zhou Ye was framed and secretly pursued the case on his own. After recovering her memory, Shen Tao went undercover to gather evidence. In the end, she and Zhou Ye joined forces to bring Bai Keyu and his entire group to justice. A year after their wedding, Shen Tao gave birth to a baby named An'an and became a university lecturer in forensic pathology, while Zhou Ye was promoted to captain of the criminal investigation division. Shen Tao's adoptive mother returned from abroad to help care for the baby. Xiao Lin fell in love with Shen Tao's younger sister, Shen Yue, and An'an became the police force's darling. As they continued to uphold justice, everyone found happiness and fulfillment in their lives.
