For the ten people trapped in a living nightmare, things are about to get worse. Unable to escape from a life-threatening situation, one of them is discovered dead. The tension escalates when the survivors realise there is a murderer among them, who is preparing to strike again and again... With mounting desperation, people begin to turn on each other. And while they struggle to identify who is responsible, each must contend with their own past, the claustrophobia and the secrets they are hiding. But who is who? And which of them will be next? As the pressure builds, time is running out...