A formation of meteorites lands in Cornwall, a group of scientists led by Lee Mason (Jennifer Jayne) investigate but are soon taken over by invisible aliens (when you are making a low budget sci-fi movie invisible aliens are always handy). Meanwhile Dr Curtis Temple (Robert Hutton) wonders what has happened to his girlfriend Lee and why the scientists need so much equipment...
Dr Temple investigates the site and finds a major operation taking place, even rockets being launched towards the Moon. The personnel at the site are hostile but find they cannot take over Dr Temple as he has a silver plate in his head after a recent road accident...
With the help of his friend Farge (Zia Mohyeddin) Dr Temple develops a detector for the aliens, steals a few ray guns and then ends up on the Moon to face the Master (Michael Gough)...
It is all rather cheesy and very of it's time, it is also very British as the aliens are very polite. Despite the flaws this is a quite reasonable sci-fi film.