Three years after the success of Shock Wave, Herman Yau is back with a thematic sequel that doubled the first film’s budget and has now tripled its box-office take. Andy Lau is back in the lead – inevitably, in a different role – as Poon Sing-fung, a heroic bomb disposal expert of the EOD (Explosive Ordinance Disposal Bureau) who loses part of his leg in an explosion. Fitted with a prosthetic leg and having gone through an extensive and triumphant reeducation, he fully expects to return to the job to which he devoted himself body and soul, but is instead offered desk jobs or PR positions, as his superiors don’t want to take the risk of returning a disabled officer to the field. Enraged at the rejection, and at a society which undervalues the disabled, he quits the force, severing his relationships to his girlfriend Pong Ling (Ni Ni), an officer of the counter-terrorism unit, as well as his best friend and colleague Tung Cheuk-man (Lau Ching Wan) and their team. Cut to five years later, Poon is seen planting a bomb at a fancy reception; dozens of people die in the ensuing explosion, and he’s found unconscious at the crime scene. When he awakes, he has amnesia and can’t even remember who he is; the police suspects him of being a part of the terrorist organization known as ‘Vendetta’, responsible for a slew of bombings in the past months in Hong Kong. With only fragmented memories coming back to him, but convinced he is innocent, Poon escapes and tries to uncover the truth.