Set during World War II, a German army garrison is sent to guard a mountain pass in a village in Romania's Carpathian mountains and sets up barracks in an ancient stone fortress. Two of the soldiers unwittingly release a mysterious entity that kills or corrupts those within its influence, drawing the attention of a Gestapo commander, a Jewish scholar, and a mysterious traveller.
A crack test pilot lands to find the planet has been devastated by unknown forces. There are a few survivors, so he organizes them in a plan to ward off control by a group of killer robots.
Ten people are invited to go on an African safari, only to find that an unseen person is killing them one by one. Could one of them be the killer?
