During World War II, Chinese mainland, Hong Kong and Singapore have fallen, Macao survived alone and became the only transit point between China's mainland and the outside world, known as "Oriental Casablanca" by Westerners. In the autumn of 1942, the communist Yun Liu went to Macau to find Fu Zhou, the boss of "Oriental Hotel", drawing the map to rescue the "cultural elite" trapped in Hong Kong. When he finished the map and ready to go to Hong Kong, the Kuomintang's undercover Yingxiong Meng got the news. Yingxiong Meng do not want to reveal his identity, then he asked the Japanese spy to borrow a knife to kill Yun Liu..—Shanghai Creasun Media