Montage

15 years ago, a little girl named Xizhen was kidnapped and murdered. Although the police officer Oh Ching-ho (played by Kim Sang-kyung) of the Crime Squad agreed to Xizhen's mother (Uhm Jung-hwa) ) must bring the murderer to justice, but after a long investigation, nothing was found. Seeing that the prosecution period was approaching, Officer Wu made a desperate move and missed the suspect. After that, Officer Wu left the police force with regrets and lived a decadent life. However, Xizhen's mother never gave up her belief in chasing the murderer. She used her fragile woman's body to launch an independent investigation and finally discovered the clues left by the criminal. Not long after, another little girl was kidnapped in broad daylight. The method of committing the crime was exactly the same as the Xizhen case. The police immediately set up a dragnet to deal with it. Faced with a cunning suspect, the police had no choice but to call out Wu Qinghao from Xianfu's home again. The little girl's life hangs on a thread. Can Xizhen's mother and Wu Qinghao catch the criminal and fulfill their long-cherished wish...