A terrorist expert in explosives, whose gang has been dismantled, seeks revenge. He threatens to blow up a Hong Kong tunnel with hundreds of hostages. The policeman who has already beaten him once must stop him again.
When a bomb went off unexpectedly during a police operation to disarm it, Poon Shing-Fung, a bomb disposal officer, got caught in the blast and thus lost one of his legs. Poon decided to leave the police service. Three years later, the police suspect Poon, who was found in a coma at the spot of a terrorist bombing attack, of being involved in several bombing attacks in the past two years. Poon can hardly remember his past and even his own identity due to Post Traumatic Amnesia. He plans to escape to find out the truth. Meanwhile, knowing the terrorist organization's schemes of destroying Hong Kong landmarks, Poon, as the key person between the police and the terrorist organization, would possibly save or destroy lives of the innocent civilians in the city.
SYNOPSIS SHOCK WAVE 2
In Hong Kong, a mysterious terrorist organization, Vendetta, run by Ma Sai-kwan (codename Maverick) and a mysterious individual known as Blizzard, bombs the region's education bureau, making it the center of the police's attention. Poon Sing-fung, Ma's friend and a former Hong Kong Police Explosive Ordinance disposal officer who lost his leg to a neglected explosive in a rescue mission five years ago, was denied of his career by his superiors in fear of damaging the police' reputation for employing the handicapped.

Enraged by their blatant betrayal, he joined Vendetta. Four months later, he is spotted placing a bomb at a hotel by security. Poon is unconscious after the bomb explodes and is now a suspect. He wakes up in a hospital with no memory about what happened, and escapes during an interrogation. Pong Ling, chief inspector of the Counter Terrorism Response Unit, and Lee Yiu-sing, CID Chief Inspector, are assigned to find out who is behind the bombings and the identity of the Blizzard and their supposedly meeting with an individual known as "Davy". Vendetta operatives are sent to the hospital to retrieve Poon but are killed by Lee.
Poon corners Pong Ling after the chaos. She reminds him of his past life after his leg loss, such as being a model officer in the Explosive Ordnance Disposal Bureau (EODB), his deteriorating relationship with his superiors, and his slandering of the police forces in a ceremony honoring him. Poon is also told he is the Vendetta member Blizzard. While most of this is true, Pong claims that he joined Vendetta undercover to stop them and reclaim his career.
Pong tells Tung Cheuk-man, another EOD officer and Poon's best friend, that when Poon fell into a coma, she hired top neurology doctors to manipulate his allegiance via implanting false memories. Tung is upset with their methods and only plays along as Poon's friend. Pong retorts that this is the best way for the HK supreme court to show Poon mercy after his involvement in the bombings.
Upon receiving a message containing inspiration magazine from Al-Qaeda, Poon meets with Vendetta's leader Ma Sai-kwan and four other members of the group, codenamed Money, Slave, Sniper and Rhino who are all planning yet another attack. Vendetta sends Sniper to place a bomb in the middle of the city, which would destroy a large area by rupturing gas pipelines below it. Tung, Inspector Lee, Pong Ling, and Poon's former co-workers in the EODB, Lun Ting-pong and Chan King-to, are dispatched to the scene. Sniper kills Chan and severely wounds Tung (who survives in part to his suit's armor). Unable to properly shoot Sniper at range, Pong's squad is forced to find their way around and eventually take him down.
Poon is then spotted talking to Pong by Vendetta, and he later wishes to withdraw. Feeling betrayed, Ma traps Poon based on a board game (Mastermind) in order to force Poon to remember who he is before leaving. Pong and Tung arrive with a squad to save Poon, though they fail initially until Poon recalls Ma's Mastermind combination, allowing Tung to free him at the last moment. Poon tells them Vendetta is planning to bomb the IFC building and the Hong Kong airport, while "Davy" is a tiny nuclear warhead. If detonated, it is of 10 to 20 tons of TNT equivalent and will leave the area irradiated for centuries to come. They then rush to intercept the Vendetta terrorists.
Ma and his men simultaneously raid the IFC and Hong Kong MTR as well as the Airport tram. He hijacks a train and has his men plant bombs and the Davy Crockett bomb and leaves with the train but not before his men take hostages to slow the police down. Lun and his co-worker Fat Sze managed to defuse the rigged van in IFC parking garage while also killing Money and Slave. Inspector Lee arrives with his team and kills the Vendetta members to secure the area. Lun manages to intercept the other train carrying the other bomb and arranges to ram the bomb train into the water.
The plan involves destroying both connections of the Tsing Ma Bridge to sink the explosives, thereby minimizing any collateral damage. Pong and her CTRU teams successfully raid the control station, killing Rhino's men, and he commits suicide.
Poon and Tung arrange for the rigged van to be near a strategic location before arming the bomb. Tung escapes into the helicopter, but Poon insists staying behind as atonement for his involvement in the previous Vendetta terrorist attacks. Tearfully saying goodbye to Pong, Poon sacrifices himself to destroy the bridge. With Lun's help, Kawn's train is intercepted by the severed bridge and sinks before exploding moments later, killing him and Poon while sending a shockwave underwater, saving HK from a potential fallout. Tung and Lun mourn Poon's death, while Pong is left in tears wondering if Poon's sacrifice was worth all their efforts.
In the closing scenes, Pong requests one of the neurology doctors to erase all her memories associated with Poon, save for one particular moment. She then flashes back to encountering Poon at a police dinner, where he deliberately spills some red wine on her uniform to catch her eye.
CAST
- Andy Lau as Poon Sing-fung (潘乘風), a former Bomb Disposal Officer of the Explosive Ordinance Disposal Bureau (EODB) who resigned after Hong Kong Police Force denied his original position in fear of his injury. Enraged by their betrayal, he joins "Vendetta", where he is codenamed "Blizzard" (暴雪). Five years later, he becomes a top suspect of a terrorist attack after falling unconscious from an explosion, which resulted in him having amnesia.
- Sean Lau as Tung Cheuk-man (董卓文), a Bomb Disposal Officer of the EODB, as well as a partner and friend of and Poon. He remains supportive of Poon at all times.
- Ni Ni as Pong Ling (龐玲), Poon's ex-girlfriend and chief inspector of the Counter Terrorism Response Unit (CTRU) who devises a plan to brainwash Poon into believing he was an undercover cop in order for him to receive a lighter sentence.
- Tse Kwan-ho as Ma Sai-kwan (馬世軍), codenamed "Maverick" (獨行者), Poon's former schoolmate and the anarchist leader of Vendetta (復生會) terrorist organization.
- Philip Keung as Lee Yiu-sing (李耀昇), chief inspector of the Criminal Investigation Department (CID) who has a hot-tempered and impetuous personality.
- Ron Ng as Lun Ting-pong (倫定邦), an Assistant Bomb Disposal Officer to Tung.
- Kenny Wong as Chan King-to (陳景圖), an Assistant Bomb Disposal Officer of EODB.
- Timothy Cheng as Commissioner Chan (陳Sir), Director of the Operations Department.
- Timmy Hung as King, senior inspector of CTRU who is Pong's subordinate.
- Ben Yuen as Chin Ka-on (錢家安), a member of Vendetta whose codename is "Money" (金錢)
- Wilfred Lau as Sze-to Wai (司徒偉), a member of Vendetta whose codename is "Slave" (奴隸).
- Ling Man-lung as Siu-hak (小克), a member of Vendetta whose codename is "Sniper" (狙擊手) and was even trained by Blizzard personally.
- Marc Ma as Rhino (犀牛), a member of Vendetta whose real name is unknown.
- Babyjohn Choi as Cheung Chi-man (張志文), a doctorate graduate, revealed to be a member of Vendetta, whose codename is "Doctor" (博士).
- Raymond Chiu as Fat Sze (肥司), an Assistant Bomb Disposal Officer of EOD.
- Jerome Cheung as Stephen, a CID inspector who is Lee's subordinate.
- Zhang Yang as Mon, an Assistant Bomb Disposal Officer of EODB.
- Olivia Yan as Wong Ching-yee (王靜儀), a psychology professor who implants false memories into Poon for him to believe himself to be an undercover cop.