Some time after the Mousekewitz's have settled in America, they find that they are still having problems with the threat of cats. That makes them eager to try another home out in the west, where they are promised that mi…

大地在污染和环境灾害的双重打击下，已经处在崩溃的边缘，为了生存，人们创造了一个与世隔绝的都市，叫做ECOBAN(这个名字由ecology和ban合并起来，意思是“毁灭生态”)，而这个都市完全靠大地的污染物苟延残喘。　　但是，只有极少的经过…