邓小龙（许冠英 饰）从小就为人正直、乐于助人，他的志愿就是长大了能当一名除暴安良的好警察。无奈天意弄人，他因身材矮小，而且天生色盲，于是被警局拒之了门外，他只好去保安公司当了一名护卫员。保安主管周世昌（许冠文 饰）是一名老油条，为人尖酸刻薄、贪生怕死。下属阿Sam（许冠杰 饰）一早就看他不顺眼，只是有冤无处申。 这次，公司的太子王平凡从国外留学回来，假扮保安混进了公司考察情况。不久阿Sam和小龙就因工作出色而获得提拔，而周世昌却被剥夺了主管之位降职任用，还有几个月就可以退休享受的他会为了退休金忍下这口恶气还是会另有所谋？
善良且性格泼辣的的东北女孩吴迪，用情很真，男朋友在北京生活，已经有很久没来东北看她了，所以，在经历了深思熟虑之后，下定决心去北京找男朋友结婚，在周末的晚上，她驱车直奔心中所爱。 勇哥、海利、博子是三个非常要好的朋友，经常凑到一起喝酒、唱歌。在一次酒后阴差阳错的搭着吴迪的车去了北京！ 吴迪略带兴奋的敲响了男友家的门，让她没有想到的是，自己深爱的男朋友却是一个已婚男，感情受到欺骗的吴迪彻底愤怒了。而此时，勇哥三人赶到，发现吴迪受了欺负，颇具正义感的他们冲了进去，对这个感情的骗子给予了小小的惩罚。 吴迪和勇哥他们四人再也无心逗留，一起踏上了归乡之旅，他们走走停停，沿途的美景让吴迪的心情大好，也让勇哥三人逐渐了解了吴迪的内心。在旅店住宿的时候，他们还和警察合力擒住逃犯。还误打误撞的进入了一个拍戏的场地当中，本已身无分文的他们更显拮据，但是依然保持着乐观的态度，一路上想尽各种办法赚点小钱，增进感情的同时，还合力帮助路上遇到困难的人。 从陌生到友情，从怀疑到信任，四个人各有各的性格，内心却都是善良的。一路上有惊险、有欢笑、有泪水、有正能量的挥发，但是他们收获的却是最真、最为醇厚的友谊！
Siskel and Ebert once ran a special show entitled "Movies I'm Embarrassed to Admit I Liked." I suppose that if I composed such a list of guilty pleasures, this one would be one of them . . . but upon reflection, it's really a lot better than that. Fifteen year-old science prodigy Mitch (Gabe Jarret) is recruited by ambitious college professor William Atherton (in yet another of his patented roles as a loathsome character) to work on the professor's prize laser project, not knowing that the prof is really developing a government weapon. Along the way, Mitch is befriended by Chris (Val Kilmer), another prodigy a few years his senior who teaches the Mitch how to loosen up. This could have degenerated into nothing more than just another teen revenge comedy, but there's so much more: the dialogue is laced with sharp wit there are some lovely scenes that have nothing to do with the story yet are carefully set up, almost as blackouts (e.g., Mitch goes to a lecture at which a few students have left tape recorders instead of attending later, at another lecture there are more tape recorders than students and, in a final scene, one large tape recorder gives the lecture to a room populated by nothing but other small recorders!) and throw-away scenes that make you want to stop and back up the tape (e.g., Chris off-handedly cutting a slice off a bar of solid nitrogen to make a slug for the coffee machine). It's also one of the few movies to boast the presence of the memorable Michelle Meyerink -- as Jordan, the "girl-nerd" who made being smart and female something to be emulated. And there's Tears for Fears great song, "Everybody Wants to Rule the World" providing the perfect coda as the closing credits begin to roll . . . . Yes: really now, what's there to be embarrassed about?
