Partridge (Sammo Hung), Rhinoceros (Feng Cuifan), Dashandi (Ng Man-tat), Monk Fruit (Eric Tsang), American Ginseng (Chin Xianglin), Daliwan (Jackie Chan), Barbara (Hui Chung) and Vic (Yuen Biao) and other police brothers went on a long vacation to travel. Unexpectedly, they were notified by their superiors to return to Hong Kong immediately to perform their duties as soon as they arrived at their destination. It turned out that Mr. Feng, a wealthy Hong Kong businessman, was killed by a killer. His daughter Miss Feng (Rosamund Kwan) and Mr. Feng’s friend Mr. Liu are now in danger of life at any time. So, in order to protect the two, Daliwan and his assistants closely guarded Mr. Liu; while the young and beautiful Miss Feng lived in Barbara’s house and was protected by Rhinoceros and others. Everyone wanted to get in touch with this beautiful and open Miss Feng; Vic and Barbara moved into the Feng family to lure the killer into the trap. In the summer, a series of hilarious and thrilling scenes were staged!