乌龙科学家韦恩（里克·莫拉尼斯 Rick Moranis饰），再次错误操作他危险的科学实验，而这回的“受害者”是他自己跟哥哥，还有他们的妻子。在这次事故中，四个大人被瞬间缩小到连葡萄干都不到的尺寸，只能用放大镜才能看见他们。他们跟“庞然大物”蟑螂斗智斗勇，更要想方设法让他们的孩子得知这个消息。可毫不知情的孩子们，丁点儿也没发现他们的家长都被缩小的事实，他们根本听不到大人们如蚊子叫般的求助声。绝望的四个大人该怎样向孩子们求救呢？ 《亲爱的，我把孩子缩小了》跟《亲爱的，我把孩子放大了》的好戏意犹未尽，这回上演的是大人们的惊险奇遇记。
Theo Abrams is an ex-Cape Town fireman suffering from severe Post-Traumatic Stress Disorder. Unable to return to work due to the psychological trauma sustained during a failed rescue mission, an increasingly frustrated and volatile Theo's world is rocked when one morning, he wakes up next to his wife's murdered corpse with no recollection of what transpired and all evidence suggesting that he's killed her. When the police label him as the prime suspect, Theo goes on the run, and is soon being hunted by Deputy Chief of Police, Alan Shard, a notoriously ruthless soldier of the law, who is hell-bent on catching Theo as one last act of service before he officially retires. However, when an unknown third party is thrown into the mix, Theo discovers an alarming connection between the sinister forces hunting him in an attempt to silence him permanently for a reason he can't comprehend; and a recent investigation his wife was conducting into a global armament contractor. When connecting the dots becomes a matter of life and death, Theo becomes embroiled in a desperate fight for survival and must figure out who really murdered his wife before a terrifying conspiracy changes the course of a nation forever.
孤儿西蒙（方·基默 Val Kilmer 饰）幼时生活在教会孤儿院中，那里留给他的，除了施洗者约翰的新名字与严苛的惩罚以外，还有撬门开锁的能力。多年以后，西蒙已经是著名的大盗，他计划筹措5000万之后洗手不干，享受人生。西蒙受命远赴莫斯科，盗取了政党领袖兼石油寡头伊万（拉德·舍博德兹加 Rade Serbedzija 饰）的芯片，自此与伊万父子“结缘”。西蒙为高额报酬再度接受任务，而这次的雇主居然是伊万父子，他们命西蒙盗取足以解决能源危机的核技术。西蒙乔装接近掌握核技术的艾玛博士（伊丽莎白·苏 Elisabeth Shue 饰），与博士暗生情愫的同时，应付着伊万父子的棘手任务……
