"Zhang Zaishan (played by Andy Lau) is a senior inspector of the "Explosives Disposal Division" of the Hong Kong Police Force. Seven years ago, he lurked into the criminal gang of the most wanted criminal Huo Bang (played by Jiang Wu). During a treasury robbery, Zhang Zaishan revealed his identity as an undercover bomb disposal team and cooperated with the police inside and outside to successfully prevent the bombing. .."