Fifteen years ago, a little girl named Seo Jin was kidnapped and killed. Although the police officer of the Crime Squad Wu Qing-hopromised Seo Jin’s motherbring the killer to justice, he had no choice but to go through a long investigation. But always get nothing. Seeing that the prosecution period was approaching, Officer Wu made a desperate bet and missed the opposite of the suspect. After that, Officer Wu left the police force with regret and lived a life of decadent life. Xizhen's mother has never given up her belief in chasing the murderer. With the help of a weak woman, she launched an independent investigation and finally found the clues left by the criminal. Not long after, another little girl was kidnapped in broad daylight. Her modus operandi was the same as that of Xizhen's case. The police immediately set up a net to deal with it. In the face of the cunning suspect, the police had to once again invite Wu Qinghao from Xianfu's home.
The little girl's life is hanging by a thread. Whether Xizhen's mother and Wu Qinghao can catch the prisoner, it is their long-cherished wish.
