A group of ten people, strangers to one another, have all travelled to a hotel located deep in the deserts of Iran. Upon arrival they discover that their host is mysteriously absent. Though some find this odd; they decide to make the best of the situation and settle into the isolated-but-luxurious hotel. But soon they are accused by a tape recording of having committed various crimes in the past which went unpunished by the law. Then one victim dies of poisoning. Suicide? Maybe, maybe not... When someone else is found strangled to death, the remaining guests deduce that their unseen "host" is determined to murder them one at a time for their past misdeeds. And since a search of the hotel proves that there is no one hiding among them, they realize that the murderer is, in fact, one of their own.