The extravagant cop Michael Dooley needs some help to fight a drug dealer who has tried to kill him. A "friend" gives him a dog named Jerry Lee, who has been trained to smell drugs. With his help, Dooley sets out to put his enemy behind the bars, but Jerry Lee has a personality of his own and works only when he wants to. On the other hand, the dog is quite good at destroying Dooley's car, house and sex-life... 托马斯杜力是个麻烦的警察，他的同事都认为跟他搭档很难搞，这时来了个杜力的新搭档杰瑞李，他对毒品的嗅觉非常敏锐，只不过“他”是只训练精良的德国牧羊犬，别称“冲锋九号警”，他俩的组合可说是该镇的绝佳搭档。两人的聪明程度不相上下，要看谁比较厉害，就要仔细观赏这部趣味横生的动作喜剧片。
