[1] Some time during the 1930s amidst the Second Sino-Japanese War, Chinese secret agent Fok Ming-ming is sent to Kaa Yi near Tibet to investigate the Japanese occupation that has been set up there.

Ming-ming and her friends discover that the Japanese occupation plans to convert the town into a weapons manufacturing site, but they are captured before they can warn the locals.

The once peaceful citizens of Kaa Yi then prepare to defend their town against the Imperial Japanese Army, under the guidance of Ming-ming and her friends.

[citation needed] Five years later, The Michelle Yeoh Collection DVD were released on 9 January 2006 at 3 disc set including two films they were: Police Assassins and Wing Chun.

[2] Extras included commentary tracks from Asian cinema expert Frank Djeng and action cinema experts Mike Leeder and Arne Venema, vintage interviews with Yeoh, and the original theatrical cut complete with its original end credit ending.