A strange and surprisingly compelling early Michael Mann film. About some Nazis who hold up in an oddly constructed keep in Romania. Things start to go wrong when the soldiers remove one of the large stones from the interior walls, releasing an ominous power that begins to kill them.
The story is somewhat confused and probably compressed from the source novel of the same name. The sound mix is annoyingly quiet in parts, while being loud in others. One for the cinema, I guess. Some of the effects are really rather good, especially some tricks with smoke.