Plot

Sr. Inspector Cheung Sung-bong (Donnie Yen) sets out to track down former Sr. Inspector Yau Kong-ngo (Nicholas Tse) and his team, as they ambushed many officers during major drugs bust against a gangster named Wong Kwun. Yau and his team finishes Wong Kwun and steals the drugs. It is revealed that Yau and his team wants to exact revenge on Cheung and the police department for having them imprisoned on charges of beating a suspect named Coke to death during a case on the disappearance of a bank tycoon named Fok Siu-tong, who runs a bank named HK Fortune Banking.

Cheung and his team raids nightclubs in order to know about the drug dealer who sold Wong Kwun's drugs. They soon learn about the drug dealer named Gwai and tries to capture him, but Gwai dies as he tries to escape Cheung. During a date with his girlfriend Kwan Mei-you, Chu Yuk-ming strangles Mei-you to death after he finds that she is cheating on him. Wong Kwun's watch is found on Mei-you's body and Cheung realizes Chu had stolen the watch and deduces Yau's involvement in Wong Kwun's death. Cheung tracks down Chu and a chase ensues where one of Yau's teammate Law Kim-wah gets arrested by the police.

Yau kills Chu in order to cover his tracks, where he along with his other teammate Mok Yik-chuen soon arrives at the police station to file a complaint about his another teammate Chiu Chi-keung's disappearance. The police soon find Chiu's body and learns that Yau strapped Cheung's former superior Sze-to Kit (Ben Yuen) with a timed collar bomb to his neck, and sent him to hold Cheung's pregnant wife Anna Lam hostage. Cheung manages to rescue Anna but Kit dies in an explosion. Yau, Wah and Mok are released due to lack of evidence, where they form a plan to rob HK Fortune Banking.

Cheung soon learns about their plan where he along with his team head to HK Fortune Banking. Yau and his teammates rob the bank and shoots Fok due to his disappearance being the reason behind his imprisonment. Cheung locates Yau and his teammates and a chase ensues where Yau's team are all killed trying to flee. Yau is cornered by Cheung and they have an intense fight in a church. As police surround him, Yau kills himself by falling on an exposed rebar rather than going back to jail, while Cheung walks away.

Cast

• Donnie Yen as Cheung Sung-bong (張崇邦), senior inspector of the Regional Crime Unit
• Nicholas Tse as Yau Kong-ngo (邱剛敖), Cheung's former protege and former senior inspector
• Qin Lan as Anna Lam (藍可盈), Cheung's pregnant wife.
• Simon Yam as Lok Chi-fai (駱智輝), Deputy Commissioner of Police
• Ray Lui as Yiu Yeuk-sing (姚若成), Superintendent of the Regional Crime Unit and Cheung's superior officer and mentor.
• Ben Yuen as Sze-to Kit (司徒傑), former Commissioner of Police and Cheung's and Yau's former superior
• Ben Lam as Au Man-kwai (區萬貴), a drug dealer
• Ken Lo as Ma Kau-wing (馬交榮)

Production

The film was first announced at the 2019 Hong Kong Film & TV Market (FILMART).[6] Producer and star Donnie Yen revealed that the film had originally been planned to be filmed in a foreign country, but he persuaded co-producer and director Benny Chan to stay in Hong Kong for filming. Production began in April of the same year. On 6 May 2019, a scene was filmed involving Yen jumping from a balcony for which he was suspended on wires for two hours. The film held its blessing ceremony on 23 July 2019 at a constructed set on Peking Road in Quarry Bay Film Studio that was attended by Emperor Group head Albert Yeung, Chan, Yen and the rest of the cast and crew. Production for the film wrapped up in September 2019.

On 23 August 2020, director Chan died from nasopharyngeal cancer. It was reported that he had fallen ill during the film's production and had later been diagnosed with the illness. Chan completed his directing duties for the film but was unable to take part in post-production due to his illness.