In the third instalment, Inspector Shin-Nan (Carol Cheng) is ordered to protect a high-rank chairman from the PRC during his stay in Hong Kong. At first, the task doesn’t seem so challenging; yet, Shih-Nan, together with her nephew Sheng (Alfred Cheung) end up arriving in Taiwan instead of Hong Kong just at the beginning of their journey. To make matters worse, when they finally get to HK, the news come about a possible assassin on the loose who is planning to kill the visiting politician. The team, with the aid of a cheerful but extremely emotional Taiwanese police officer called Chiang (Chan Chung-Yung) and a strongly overconfident HK Inspector Lu (Anthony Wong) prepares for the visit. Will Shih-Nan be able to stop the potential threat just in time?