Four young students, two girls and two boys go missing from an exclusive English private school. After an 18 day search nobody expects to see them alive again, but one of the girls reappears. Liz has survived the ordeal. As she relives the experience of being trapped for two weeks in a dark, underground bunker, it becomes clear that she is so traumatized by what happened that she can’t sort fact from fiction. But what really happened in the hole? As detectives dig through the bunker, a terrible truth begins to emerge, where each piece of the puzzle threatening to expose the full horror of the actual events; an obsession that became the ultimate nightmare.
Quatre étudiants d'une prestigieuse université britannique manquent à l'appel depuis 18 jours. Personne ne croit plus les revoir. Mais voilà que réapparaît Liz, une des disparus, couverte de sang et traumatisée par ce qui vient de lui arriver.