After being shuttered for over 500 years following a horrific, intentionally staged family massacre, a mysterious Hungarian castle opens it doors with the apparent intention of attracting tourist business. A diverse group of people from different parts of the globe is assembled at the eerie dwelling after having been chosen at random (or have they?) when they applied for a visa. But once they arrive some begin to wonder if there is more going on than meets the eye. First they hear terrible stories about savage packs of wolves that used to roam the area and then people begin to disappear, only some of whom are found later with their throats torn out. It soon becomes clear that a murderer is among them, and the culprit may only partially be human.
However, as the story progresses and the ultimate truth is revealed, ties between predator, prey and the very castle itself will be fatally exposed.