Professor Bernard Quatermass (Brian Donlevy), in his attempts to convince the British government to colonize the moon, learns that thousands of meteorites are landing in the same location on Earth. When his colleague Marsh (Bryan Forbes) joins him in a quest to uncover the truth, they discover a government complex built around the landing spot. When Marsh goes missing, Quatermass attempts to rescue him -- and discovers the truth behind an alien invasion conspiracy and cover-up.
