Beast Stalker (2008)

Sergeant Tong Fei (Nicholas Tse) meets his team at a dim sum restaurant to prep for a bust. They charge up to an apartment and one officer gets shot. After the bust Tong screams at one of his team mates for not paying attention that led to another officer being shot. Tong is a very serious cop that is very passionate at his work.
On the street Tong and (Liu Kai-Chi) eyes Cheung Yat-Tung(Philip Keung) and other suspected armed robbers getting into a car. They tail the suspects which leads to a massive car crash. Cheung jumps into another car. Tong chases the car and starts shooting at it. The car swirves uncontrollably and stops on the side walk. Tong carefully walks up to the car but everyone is dead or unconciou. He sees that there's blood leaking from the trunk. There was a little girl dead in the trunk from his shots.

3 months later, Cheung is indicted for armed robbery that was before the massive car crash. His prosecutor is Ann Gao (Zhang Jingchu). [It turns out that the little girl in the truck was Ann's daugther. They had hijacked Ann's car after their car crashed] Tong is stuck with gilt and has become friends with the little girl's twin, Ling (Wong Suet-Yin).

Cheung hires Hung (Nick Cheung) to kidnapps Ling to extort Ann into destroying evidence in Cheung's case. Tong goes through trash to find the caller that was trying to extort Ann.
Hung is willing to do anyone's bidding to earn money. One of Hung's eye is blind and another is going blind because there are pieces of glass stuck inside. Nick cares for his wife (Miao Pu) who is paralyzed and can only use her thumb to text Nick messages.

Ann does what the kidnappers request for fear the loss of her remaining daughter, Ann is adamant about not informing the police. However, Tong witnessed the kidnapping and is already on the case, and will stop at nothing to make sure that Ling is safe from harm. Tong finds Hung's hideout and his paralyzed wife. Tong puts Hung's wife in an ambulance to the hospital. Hung gets back in time to kidnapps the ambulance. At the end Hung, Hung's wife, Ling and Tong is in an empty construction site. Tong begins a long fight to return Ling safe and unharmed.  

From the fight Hung ends up completely blind and asks Tong to take him to his wife. At her bedside, Hung remembers the day she became paralyzed. Hung's profession is a killer. One day while walking in the street with his pregnant wife, they get chased by thugs that want to kill him. They jump into a car and Hung's wife goes into labor. Hung pushes the gas peddle to get her to a hospital and thats when they get into a nasty car accident. [coinvidentally, the accident also involved Tong and his car chase with Cheung in the beginning of the movie] 

At the end Hung is arrested and his wife taken away. Tong brings Ling safely back to her mother.