While on detention, a group of misfits and slackers have to write a letter to the President explaining what is wrong with the education system. There is only one problem, the President loves it! Hence, the group must travel to Washington to meet the Main Man. 一群放牛班的学生竟应邀至白宫访问，而这班疯狂学生当然要藉机＂大举疯狂＂一番。班上的帅哥DAGS和乖学生REGGIE向来是死对头，校长为了处罚这班，要求他们写信给总统纾发教改理念。结果总统竟邀请全班来国会演讲。但他们却卷入了参议员鲁曼的政治阴谋；他想利用这群无知的学生来达成他的政治野心。这趟道到白宫的公车之旅，学生想尽花招来整校长，又有个神经病来搅局。到达华盛顿的豪华旅馆更展开了一场疯狂派对。但意想不到的是他们竟救了总统一命，光荣返乡。
