Bullets Over Summer

Bullets Over Summer is a 1999 Hong Kong action film directed by Wilson Yip and starring Francis Ng and Louis Koo. Ng and Law Lan were awarded Best Actor and Best Actress respectively at the 6th Hong Kong Film Critics Society Awards while Law was also awarded Best Actress at the 19th Hong Kong Film Awards and Best Supporting Actress at the 5th Golden Bauhinia Awards.

Not long after, Mike discovers he was infected with a terminal illness and is running out of time. Mike makes a trading deal with Dragon where he obtains large sum of money for Jennifer to support herself and her child in the future. At the same time, he does not forget his responsibilities as a police officer and notifies Brian the whereabouts of Dragon. Together, Mike and Brian start a battle against Dragon to take him down.

Source: Wikipedia