At a small, rural British lab, monomaniac Dr. Laird and his staff create ultra-intense magnetic fields. Inexplicably, the apparatus seems to be affecting distant objects, and to be drawing "extra power" from...somewhere. One night, after a "freak" storm, strange and deadly things start happening in Bryerly Woods, and a strange man from "a long way off" appears in the district...concerned about Laird's pulling down disaster from the skies.