Sworn Brothers (Chinese: 肝膽相照) is a 1987 Hong Kong action crime drama film directed by David Lai and starring Andy Lau and Cheung Kwok-keung as step brothers on the opposite sides of the law as a triad and cop respectively.
When Lam Ting-yat was little, his father died and he was raised by police officer Uncle Pau and was very close to his son Ngan Kwok just like brothers.
Now Kwok has become a police inspector who just came back to Hong Kong after training in the Scotland Yard and Ting is a triad member working for crime lord Yeung Tung-hoi.
When Kwok came back to Hong Kong, he and his father and Ting had dinner and afterwards they went out and competed on who can pee the longest in an alley.
Peggy goes to the side and cries, until Ting comes by and consoles her and takes her out to dinner and stay overnight at his house.
Later, Kwok comes up to Ting's house where he buys him breakfast and makes coffee and sees Peggy, who attempts to leave through the back door.
She refuses it in front of him and gives it to her fat colleague but takes a bite at one when Ting leaves and he sees her doing so.
When everyone blames Ting to be a defector, he decides to help his boss and brings his underlings Ka-lok and Chan Kwo with him.
Ka-lok hears noise from downstairs and proceeds to get guns and alcohol from his trunk while also seeing his mother in the streets, who have not seen him in a while.
After a brief talk with his mother, Ka-lok proceeds to go up the building and comes in and throws the alcohol which causes a fire and shoots at Fung's henchmen.
At the police station, Sergeant Shek tells Commander Chan Chung-hon that he found evidence that Ting killed Fung.
Ting then tells Peggy his plan to go Brazil and cannot take her with him since he is a wanted criminal and does not know what will happen.
Peggy then convinces Ting to take her with him by stating she wants to start a new life with him and if he lives, he would have no friends, and Shek would kill her if he tries to find him.
When Shek refuses, he tries beat him and Pau bites his leg and Ting pushes him to a rake where he was stabbed to death.
Peggy then says she wishes their children in the future to join the Brazilian soccer team and play at the World Cup.
As they are kissing, Fat Ko comes up and shoots Ting in the back and he falls into the water and the ship explodes which kills Peggy and several of Yeung's henchmen.
Yeung then decides to kill him but his lawyer tell him that it is impossible to do so since he is a wanted criminal and he is locked up tightly.
Ting then says over the past ten years he has not done anything right and is a failure and says he will do something right this time by testifying against Yeung and helping Kwok recover his position.
Kwok leaves and steps in to his car but upon seeing Ting's watch, he comes back and gives it to the officers to safely store it for him.
The injured prisoner crawls out calling for help and Kwok sees this and goes in the shower room with the other officers.
Kwok sees Ting being tortured by two prisoners and hits one of them to the wall while other smashes his head with a piece of glass which knocks him unconscious.
Pau now realizes that this is a mistake and saying that he does have much time left but hopes to see the two brothers have a successful career and family.
Seeing Kwok being heavily injured in the brain and Ting being beaten badly and in prison, Pau is greatly saddened and has a heart attack and is taken away by the nurse.
Later, when Ting sees Yeung on the newspaper, he becomes furious and decides to escape from prison by holding a nurse hostage.
The judge then allowed Yeung to be bailed on HK$3 million cash and must give out his travel passports.
During the second court trial, Ting's lawyer convinced the judge that Ting lost his parents during childhood and never had a proper education while also being stressed by Yeung while Yeung's lawyer stated that his client is a rich tycoon with a net worth of HK$500 million and would not smuggle for only $3–4 million and the lack of evidence against him.