An overnight flight to Miami quickly becomes a battle for survival when Lisa realizes her seatmate plans to use her as part of a chilling assassination plot against the Deputy Secretary of Homeland Security. If she refuses to cooperate, her own father will be killed. As the miles tick by, she's in a race against time to find a way to warn the potential victims before it's too late.
Under the border leading into Mexico, within a labyrinth of caves, a deadly presence haunts all who enter. For four friends on an expedition, the caverns become an underground graveyard as the tortured ghosts prey upon them, one by one.
