Crime profiler Fong Yat-chun receives a bizarre distress call, and the caller is astonishingly from the future. They predict brutal murders are going to take place! Yat-chun teams up with female detective Ying Ho-lam and forensics assistant Chong Ding-kan to prevent the deadly incidents from happening. But the perpetrator gets a head start and commits crime. Yat-chun eventually ascertains the caller’s true identity. He also finds out Ho-lam is going to get into trouble. And Yat-chun knows his destiny as well. However, Yat-chun loses contact with the caller from the future. The perpetrator is getting closer and closer to them! The death clock begins to count down. Successive homicides that are difficult to crack take place. Yat-chun has to race against time as he wants to change the future by tracking down the perpetrator as soon as possible.