Mong-ta-joo plot
"It's not over yet. He has returned after 15 years."
Almost 15 years ago, Ha-Kyung's daughter was kidnapped. Detective Chung-Ho works hard on the case, but his efforts are in vain. Now, with just five days left before the murder trial, Chung-Ho returns to the crime scene and discovers a white flower that has been left behind. Only the kidnapper, the police and the Ha-Kyung know where the murder took place. The detective goes back to work to find the killer before the case expires. Grandfather Han-Chul leaves his granddaughter in a playground to answer the phone in his apartment. Han-Chul soon discovers that his granddaughter has been kidnapped. Police notice similarities between this kidnapping and the kidnapping of Ha-Kyung's daughter 15 years ago. Chung-Ho is once again involved in the new case, while Ha-Kyung herself sets out to find her daughter's killer.