Cheung, an officer at the Explosive Ordnance Disposal Bureau, sets out to arrest a bomber who has orchestrated a string of bombings in Hong Kong, but the latter takes many people hostage and threatens to kill them if his demands are not fulfilled by the authorities.
After a police operation to disarm a bomb goes south, bomb disposal officer Poon loses his leg in the explosion. As he finds himself a suspect in a terrorist attack, he sets out to clear his name.