63 歲的牙技師萩野谷幸三，是個半退休卻全心投入臨演工作的硬漢大叔，本片是他以新人之姿首次主演電影， 他是片中歷史劇「江戶之爪」的背景演員，卻是本片的鏡頭焦點，知名演員通通從主角變成了背景。不料空氣 般存在的臨演都比主角搶戲，際遇一個比一個離奇，他們演得忘情，忘記自己是個臨演，還不小心演得太賣力。

梅家四姐妹父母早亡，多亏大姐大香（梅艳芳 饰）独立经营点心店，妹妹二香（柏安妮 饰）、三香（陈加玲 饰）和四香（袁洁莹 饰）才能顺利完成学业，出落成开朗可爱、美丽动人的大姑娘。三个妹妹吸引来无数的追求者，她们也各自找到了心仪之人。然而梅家有个不成文的规定，只有大姐出嫁后三个妹妹才能顺序出嫁，偏偏大香不重仪表，脾气又坏，男人们唯恐避之不及，这可愁坏了三个愁嫁的女孩。为了让姐姐早日找到如意郎君，她们和各自的男友商量帮大香物色一个合适的对象。三好小男人曾灶才（曾志伟 饰）被女友爱丝（吴君如 饰）抛弃，伤心欲绝之时，他被三姐妹找来追求冰山美人大香……

Wealthy Rollo Treadway (Buster Keaton) suddenly decides to propose to his neighbor across the street, Betsy O'Brien (Kathryn McGuire), and sends his servant to book passage for a honeymoon sea cruise to Honolulu. When Betsy rejects his sudden offer however, he decides to go on the trip anyway, boarding without delay that night. Because the pier number is partially covered, he ends up on the wrong ship, the Navigator, which Betsy's rich father (Frederick Vroom) has just sold to a small country at war.Agents for the other small nation in the conflict decide to set the ship adrift that same night. When Betsy's father checks up on the ship, he is captured and tied up by the saboteurs. Betsy hears his cry for help and boards the ship to look for him, just before it is cut loose.The Navigator drifts out into the Pacific Ocean. The two unwitting passengers eventually find each other. At first, they have great difficulty looking after themselves, but adapt after a few weeks. At one point, they sight a navy ship and hoist a brightly-colored flag, not realizing it signals that the ship is under quarantine. As a result, the other vessel turns away.Finally, the ship grounds itself near an inhabited tropical island and springs a leak. While Rollo dons a deep sea diving suit and submerges to patch the hole, the black natives canoe out and take Betsy captive. When Rollo emerges from the ocean, the natives are scared off, enabling him to rescue Betsy and take her back to the ship. The natives return and try to board the ship. After a fierce struggle, Rollo and Betsy try to escape in a small dinghy. It starts to sink, and the natives swiftly overtake them in their canoes. Just when all seems lost, a navy submarine surfaces right underneath them and they are saved.

本片拍於1976年，由罗臻执导、倪匡编剧，剧情充满奇幻色彩，并由影帝狄龙领衔主演。故事描述广西蛇山中有三条巨蛇──蛇王子(狄龙 饰)、黑蛇(吴杭生 饰)及黄蛇(汪禹 饰)；一夜三蛇化成人形与苗寨男女载歌载舞，蛇王子更因此爱上苗寨女子黑琴(林珍奇 饰)。后苗寨旱灾，蛇王子答应率蛇作法，引水入寨，但条件是要娶黑琴为妻……