In 1982, a large alien spaceship stops above Johannesburg, South Africa. Reports suggest that the ship became stranded after a command module separated from the ship and dropped to Earth, nowhere to be found. After cutting their way inside, an exploratory team discovers a large group of unhealthy and leaderless arthropod-like species. These alien creatures, derogatorily referred to as prawns, are taken from the ship and housed in a government camp inside Johannesburg called District 9, which soon turns into a slum. In the first decade of the 21st century, Multinational United (MNU), a private military contractor, is placed in charge of policing and relocating the now 1.8 million aliens to District 10, a new camp 240 kilometers northwest of Johannesburg.