An explosion occurred somewhere in Hong Kong. Former bomb disposal expert Pan Chengfeng (played by Andy Lau) was suspected by the police of being involved because he was unconscious at the scene. After waking up, Pan Chengfeng could only flee while finding out the truth. However, his good friend Dong Zhuowen (played by Sean Lau) and his ex-girlfriend Pang Ling (played by Ni Ni) told him two completely different stories. Planned explosions occurred one after another, and the truth became more and more confusing...