In 2012, A teenage girl in the small Dutch town of Haren creates a Facebook event for her sixteenth birthday party, but mistakenly makes it public instead of private. Inspired by a love of the Hollywood movie Project X, Dutch teenagers make the event go viral, and soon tens of thousands of people sign up to come to the party.
Despite warnings, police and local authorities don’t think anyone will turn up. No provisions are made to entertain the masses of young people who arrive in Haren, and the party soon explodes into a full-blown riot.