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.
Thirty years ago, hardened criminal Yip Siu-tin is arrested for armed robbery and sentenced to prison. Siu-tin’s daughter, who has handled the loot, changes her name to Cheung Sum-yuet and starts a new life. She also gets married to yacht company boss Yen Ho-yin. Meanwhile, Chong Chi-kiu is a kid left behind by an accomplice who has died because of the robbery. Kind-hearted Tang Sing-him becomes his foster parent. A traffic accident causes Chi-kiu and Sum-yuet to run into each other again. But this accident somehow has something to do with Siu-tin, who is just released from prison. Sum-yuet can no longer avoid Siu-tin, who is a nightmare to her. Her marriage also has certain issues. Police officer Yeung Yan-hiu intervenes by launching an investigation, and she keeps going after Siu-tin and Chi-kiu. Unresolved grudges for thirty years are again put on the front burner. Everyone implicated in a robbery of yesteryear is drawn into this mess.