A pious 20-year-old juvenile delinquent is sent to work at a sawmill in a small town; on arrival, he dresses up as a priest and accidentally takes over the local parish. The arrival of this young, charismatic preacher is an opportunity for the local community to begin the healing process after a tragedy that happened a year prior.

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.