A group of ten friends – Jack, his girlfriend Tracy, and her brother Lucas; Alex, his friend Sam, and Sam's girlfriend Charlotte; Claire and Amelia, friends of Tracy; Jack's ex-girlfriend Ella and her new boyfriend, Noah – arrive at an isolated resort far from civilization. Each of the cars is near-empty from the long drive, and nobody has cell service. When they attempt to refill their cars, they find the gasoline tanks locked. Nobody is at the resort, though they find half-eaten food, unpacked luggage, and a car at the pumps, apparently left idling until running out of gas and draining the battery. They can not find the keys for the gas pumps or any landline phones. Jack urges them to remain calm and organizes several parties to search the area for the missing people.