In Japanese-occupied Manchuria in the WWII era, a group of Chinese nationalists sets out to destroy a Japanese poison gas factory and their opponents include a Japanese military officer and his girlfriend who has built up a false public image as a Chinese glamour girl, played by Hong Kong star Tony Leung Ka Fai and Eurasian actress Joyce Godenzi. The Japanese villains align themselves with Emperor Pu Yi, the famed 'Last Emperor' who had been deposed in 1911 but was actually re-installed as puppet ruler of the Manchu-kuo government set up by Japanese occupiers during WWII.