Dr. Andrew Boran (Kirk Scott) is picking up strange signals from outer space that seem to predict natural disasters. When he and his wife (
Sue Lyon) decide to investigate, they find themselves held captive in a convent that's been infiltrated by aliens with plans to destroy the world. As alien leader Zindar (
Christopher Lee) explains, the earth is a hotbed of disease that cannot be permitted to continue polluting the galaxy. ~ Fred Beldin, All Movie Guide