This is the debut of the music industry's "little witch" Fan Xiaoxuan. In the film, she plays a mainland girl with special abilities. Her performance is quite wonderful. She is the central character of the whole story. Because she mysteriously disappeared after arriving in Hong Kong, it caused intense investigations from all sides. It turned out that private detective Jacky Cheung, who was facing a career and family crisis, saved Fan Xiaoxuan and hid her at home. He wanted to find out what was going on. His wife Zhou Haimei was divorcing him because of different life concepts. Fan's appearance created a subtle relationship between the three of them. Fang Lingzheng used a very alternative approach to deal with this film with a strong political implication. The battle of wits and strength between the Hong Kong British authorities and Beijing representatives can be seen everywhere. The little people caught in the middle can only protect themselves by changing their minds cleverly. The last time Fan Xiaoxuan acted in a movie was when she just debuted ten years ago, co-starring with Jacky Cheung in "The Detective". At that time, her performance in the film was eye-catching and she was nominated for the Best Newcomer at the Hong Kong Film Awards.