经历了上一集中的一番折腾后，舍曼教授（艾迪·墨菲 Eddie Murphy 饰）终于要结婚了，这位幸运的未婚妻不是别人，正是他的同事丹妮丝（珍妮·杰克逊 Janet Jackson 饰）。然而，就在这个节骨眼上，那个隐藏在教授脑中的“第二人格”布迪再度出现。为了期待已久的婚礼不被布迪破坏，教授决定好好对付一下自己的这位“老朋友”。 没想到，教授的举动非但没能让布迪消失，甚至让他有了一个独立的身体，脱离了教授掌控的他明目张胆地侵入了教授的生活，并且夺走了教授辛劳多年的研究成果——能够让人短暂返老还童的血清。血清的失窃在教授的家庭里引起了轩然大波，每一个人都渴望着能够享受重回青春的快感。局势是如此的混乱，教授感到梦幻般的婚礼仿佛离自己越来越远。
Gilang is an extra actor who has been in the film industry for 10 years. Gilang always gives too much extra effort so he is blacklisted by many directors and casting directors. Excessive effort makes Gilang always run out of money to invest in his extra roles. Gilang loves a Citra award actress named Rachel Hesington. Unfortunately, Rachel is dating a rising actor, Kevin Sumitro. Kevin is the son of a wealthy businessman named Mr. Nedy Sumitro. Mr. Chen, a mining entrepreneur, kidnaps Kevin and asks for a ransom of 100 billion. The kidnapping incident occurs at the shooting location. In the confusion, Kevin is kidnapped. The kidnapper thinks Gilang is Kevin. So Gilang and Rachel are also kidnapped. The director is also kidnapped. As the story progresses, Gilang manages to overcome all the obstacles that block him, using the knowledge he learned when he was an extra in many films.
Matt's fiance leaves him at the altar. Heartbroken, he goes on their planned Italian honeymoon alone. There he rediscovers his zest for life, food, and meets Gia who helps him find love again.
