Stephen (Nick Adams) arrives in a remote English village, asking for directions to the country house where his fiancé lives... but no one will tell him! He somehow finds his way there anyway and receives a cold welcome from his future father-in-law Witley (Boris Karloff) but Susan (Suzan Farmer) insists Stephen stays. The house is a really weird one, with ghastly howls and mysterious movements at night.
Finally, Stephen and Susan discover a greenhouse full of enormous plants and hideously deformed creatures. Stephen suspects radiation from a strange glowing green rock is causing the mutations...
The film is a grower, the horror and suspense starts off low-key and implied rather than shown. The film loses some of it's power when we do see what is behind the horrifying noises to be honest as they sometimes look a bit ridiculous. A decent horror film from the period though with a little room for improvement.
