District 9

Twenty years ago, aliens from another planet made contact with Earth. Now, the refugee camp they are forced to live in has deteriorated into a slum-like ghetto. When field operative Wikus van der Merwe is put in charge of evicting the aliens, he contracts a strange virus that changes his DNA to match that of the refugees. As his body begins to mutate, he becomes a hunted man, and the aliens' only hope for freedom.