不久之前，温德尔（杰克·莱蒙 Jack Lemmon 饰）的父亲在一场车祸中丧生，这让温德尔不得不千里迢迢的赶到意大利去处理父亲的遗体。没想到，在这场车祸中丧生的并不只父亲一人，还有一个他闻所未闻的陌生女子。原来，这名女子是父亲的旧情人，每一年，他们都会在意大利幽会。父亲的出轨让温德尔十分震惊，同样震惊的还有同样赶来处理遗体的陌生女子的女儿帕米拉（朱丽叶特·米尔斯 Juliet Mills 饰）。
　　思想上的差异让温德尔和帕米拉之间产生了诸多的误会，但随着时间的流逝，父母亲之间深厚而动人的感情引导着他们慢慢领悟爱情的真谛，一段美妙情缘就此展开。

　　The moon rises at a predestined angle and awakens the sleeping Dr. Phibes in 1928, three years after the events of the previous movie. To his dismay, he finds that his house has been demolished and his papyrus scrolls stolen, the scrolls he needs to find the Pharaoh's Tomb in Egypt, where the River of Life flows. After identifying the source of the papyrus theft, he packs and leaves for Egypt with his assistant Vulnavia - whose face displays no effects from the acid shower she received at the end of the previous film (although the character is now played by a different actress, Valli Kemp). His primary goal is the awakening of his dead wife, Victoria.
　　The thieves of Phibes' scrolls suffer an attrition problem as Inspectors Trout and Waverly chase Phibes across the world. The party is led by Beiderbeck (Robert Quarry, best known for playing Count Yorga). Although he looks young, he is several hundred years old and wants to find the River of Life in order to stay alive and be with his lover Diana (Fiona Lewis) forever. This time Phibes' murders all have an Egyptian theme to them; for example, one character is sand-blasted to death. Other deaths include someone being stung to death by scorpions, being eaten by an eagle (in the original script impaled by a gold eagle in the same way a doctor in The Abominable Dr. Phibes was impaled by a golden unicorn), and a golden snake piercing someone's skull.
　　At the climax, Beiderbeck sacrifices his life in order to save Diana. The film ends with Phibes riding a raft down the River of Life with Victoria, while singing "Over the Rainbow" (which is strange, as this film is set in 1928 but "Over The Rainbow" wasn't written until 1938). It is left ambiguous whether Victoria is resurrected or not, although a picture inside the DVD shows her in the raft with her eyes open and smiling at the camera

　　霍华德（瑞安·奥尼尔 Ryan O'Neal 饰）是一名音乐学家，他带着自己的未婚妻尤妮丝（玛德莲·卡恩 Madeline Kahn 饰）前往旧金山，霍华德发现了一块火成岩石标本，这个标本能够证明音乐的起源，霍华德想要凭借着这个标本获得拉雷比基金会颁发的奖学金。
　　霍华德和尤妮丝住在一间名为布里斯托尔的旅店中，同样下榻酒店的，还有霍斯金斯太太（Mabel Albertson 饰）、史密斯先生（迈克尔·墨菲 Michael Murphy 饰）和霍华德的狂热追求者朱迪（芭芭拉·史翠珊 Barbra Streisand 饰）。巧合的是，他们四个人所拎的行李箱竟然一模一样。接待员弗里斯（斯特凡·吉拉什 Stefan Gierasch 饰）想要霍斯金斯太太箱子里的珠宝，间谍琼斯（菲利普·罗斯 Philip Roth 饰）觊觎史密斯先生手里的秘密文件，阴差阳错之下，一场大乱斗开始了。