乌嘎生活在内蒙古鄂尔多斯的草原上。一天，他如往常一样骑马走在上学的路上。每天上学他都要路过汗迪布家，找汗迪布一起上学。然而，这一天，汗迪布却要离开到城里上学了。难过的乌嘎送走了汗迪布，继续踏上上学的路。走过草原，走过公路，走过敖包，走过工厂。乌嘎终于来到了他的学校，然而，破旧的学校里只有乌嘎和他的老师。他最好的朋友们都离开了，而他的家乡也将变成草原化工城。 Augaa living in Inner Mongolia Ordos grassland. One day, he was riding his horse on his way to school as usual. Every day he goes to Khandiv's home and goes to school with him together. But this day, Khandiv would go to the city to go to school. Augaa very sad to say goodbye to him, go on the way to school. Walk through the grassland, highway, Oboo and factory. Finally he came to his school, but the old school only Augaa and his teacher. His best friends all left, his hometown will become a Grassland Chemical Industry City.