Running On Karma

Big (Andy Lau) was a Buddhist Monk, but he gave up this occupation when he realized he could see a person's past life, which would mean he would be able to predict what would happen to that person because of Karma. Big then became a bodybuilder and worked in a strip bar when he ran into Lee Fung-Yee (Cecilia Cheung). Lee was working as an undercover cop in the CID which busted Big in his strip show, but Big became entangled in another police case to catch a murderer when he tried to escape. 

While Big was running away from Lee's pursuit, he saw a police dog and has visions of the dog's previous life. The dog was previously a child who beat up dogs, and the dog was shot by a stray bullet meant for the criminal. This was the first time that Big showed his ability to see the past, and later saw the past life of Lee, a Japanese soldier killing civilians.