In an alternate 1982, an alien ship inexplicably stops over Johannesburg. When investigation teams enter the ship, they discover a population of sick and malnourished extraterrestrials, derogatorily referred to as "prawns". The South African government confines the aliens to "District 9", a government camp that is located outside of Johannesburg. Twenty-eight years later, in 2010, following periodic conflict between the aliens and the locals living near District 9, the government hires private military company Multinational United (MNU) to relocate the aliens to a new internment. Wikus van de Merwe (Sharlto Copley), an Afrikaner bureaucrat, is appointed by Piet Smit (Louis Minnaar), an MNU executive and his father-in-law, to lead the relocation.