What evil lurks in the foggy marshes of Land’s End, England?
In the 1920s, a couple traveling to Land’s End, England, runs out of petrol in the fog wherein the female (Veronica Carlson) encounters a peculiar gardener (John Hurt) and the estate of a former-minister (Peter Cushing), who lives there with his East Indian servant and… something else. Another couple shows up looking for their friends (Ian McCulloch & Alexandra Bastedo). Havoc ensues.