Thirty years ago, aliens arrive on Earth. Not to conquer or give aid, but to find refuge from their dying planet. Separated from humans in a South African area called District 9, the aliens are managed by Multi-National United, which is unconcerned with the aliens' welfare but will do anything to master their advanced technology. When a company field agent contracts a mysterious virus that begins to alter his DNA, there is only one place he can hide: District 9.
A government experiment goes totally wrong as a creature confined in a hidden lab inside and abandoned house escapes. Afterwards, some teens show up to have a little fun in the house, not knowing that the beast is loose and watching them.