Senior Chemist Tim Sir (Bobby Au-yeung) of the Forensic Science Division is highly knowledgeable, and thanks to his superb evidence-examination techniques, he has solved many bizarre cases. His subordinate and friend Ah Sam (Frankie Lam) is also an outstanding forensic pathologist; recently, he has been preparing to marry his longtime girlfriend Ting Ting (Linda Chung). Sam's friend Ivan (Kevin Cheng) has just returned from England, and after safely detonating a bomb during a bomb crisis, he impresses Tim Sir. Meanwhile, Senior Inspector Ma Kwok-ying (Charmaine Sheh) of the Narcotics Bureau and her team are investigating Hong Kong drug lord Tai Kwai, who has forced another Hong Kong drug lord, Shek Tau-yung, out and monopolized the entire Hong Kong market. Just as the Narcotics Bureau and the Forensic Science Division join forces to track down Tai Kwai's men as they trade with foreign drug traffickers and prepare to arrest the smug Tai Kwai, the car Tai Kwai is riding in unexpectedly explodes. Coincidentally, Ting Ting and Tim Sir's girlfriend—Senior Inspector Siu Yau (Yoyo Mung) of the Regional Crime Unit—are passing by. The explosion kills Ting Ting and seriously injures Siu Yau. Sam, who was preparing for his wedding, is devastated by the news. Kwok-ying is transferred to the Regional Crime Unit. She suspects that the bombing that killed Tai Kwai was revenge by Shek Tau-yung after his return, and begins investigating. Just as the case reaches a deadlock, Sam seems, as if by fate, to receive a hint from Ting Ting and finally finds evidence of Shek Tau-yung's involvement in the crime...
db8plus stands for Douban 8+, featuring exclusively films rated 8.0 or higher on Douban. Domain: db8plus.com
