A prudish girl guides' instructor Teresa (Teresa Carpio) takes a group of six girl guides for overseas training. On the plane, they meet a cosmetics salesman Mr. Wong (Raymond Wong) whom Teresa mistakes for a sex maniac. The plane crashes into an island. The island is uninhabited and unwillingly, Teresa and her girls have to co-operate with Mr.Wong. An old World War II soldier Uncle Tang (Tang Kee Chan) and his chimpanzee nicknamed Casanova living there. Uncle Tang teaches them all the tricks to survive on the island. In this apparent paradise, danger lurks. One of the girl guides accidentally discovers marijuana grown on the island. She also finds a young man David, so she brings him back to their camp and nursed him back to health. David tells all about the drug traffickers and they discover that he is also a victim. The group then plan to fight off the drug traffickers upon their next return. They spend days setting up crude traps and making weapons with natural materials available on the island. The traffickers then find themselves trapped. At the same time the police who have been following them appear and take everyone back to civilization. Yet how about Uncle Tang and Casanova, will they leave their Isle of Fantasy? (Joy Sales)