好莱坞著名演员尼克兰决定改变银幕形象,因而接下一个警探的角色。为了演好这个角色,他到纽约与一位真正的凶杀组刑警约翰摩斯,共同生活两个星期,以体验警探真实的生活。但摩斯一点也不欢迎这位大明星,却碍于上终的命令,只得带著他一起去追捕一位连续杀人的罪犯,结果每次设计好的诱捕计划都被笨手笨脚的尼克兰搞砸了。Nick Lang is a famous Hollywood actor, well known for his action movies. For his next movie, he needs the proper motivation and inspiration for his role. Thus he teams up with the reluctant New York policeman Lt. John Moss. Not only does he have to put up with Nick, who is laborious and out of touch with realities, but he also has to catch a coldblooded murderer.