A group of teenage girls board a private plane for a weekend getaway. They will not arrive. The plane experiences turbulence, and the next thing the girls know, they're on a remote island with no way of contacting anyone. Believing that their disappearance will be big news, they wait to be rescued, but no one comes.
However, it soon becomes clear that these girls are being watched by numerous cameras installed on the island as part of an elaborate social experiment. Gretchen Klein (Rachel Griffiths) is the mastermind behind it, but as one thing after another goes in a different direction than she expected, she's pressured to help the girls. Especially after the adult who was posing as a teen to guide them and who knew where food supplies were kept, has a completely random accident that takes her out of the picture.