After passing out at a party, Brie wakes up to a strange phone message: a lunatic has abducted her six friends and buried them in boxes around the city. Each box has its own deadly terror—water, gasoline, insects—waiting to kill its occupant. To add to the sadistic thrills, the killer is streaming footage of the trapped kids to the Internet—and to each other. Forbidden to call parents or police, Brie must use her wits to locate her friends' six death traps before their time runs out.