An American college student goes backpacking around South America with his sister and her friend. While in Brazil they meet up with two boisterous Brits and an Australian traveler, and when the six of them happen upon a beautiful beach, they decide to stay and party with the friendly locals. Members of the group start to disappear one-by-one however, and they soon realise they are in the midst of a terrible conspiracy that will threaten all of their lives.