Late 1960s British B-movie sci-fi horror. When a mysterious meteor shower occurs above farmland in rural Cornwall, a team of scientists led by Dr. Curtis Temple (Robert Hutton) is sent in to investigate. The scientists soon find themselves possessed by an alien force which wants to use them as slaves - apart from the indomitable Dr Temple, who appears to be protected from the deadly alien force by a metal plate fitted to his head after being injured in a car crash.