The tranquil island is suddenly rocked by the mysterious death of a local farmer. When he is found in a cave, not a trace of bone left in his body, he has been reduced to a horrible, shapeless mass. Enter eminent pathologist Dr. Brian Stanley (horror icon Peter Cushing, Brides of Dracula, The Gorgon ) and Dr. David West (Edward Judd, First Men in the Moon), a brilliant bone specialist. Working together in a desperate race against time, they must find a way to destroy the seemingly indestructible, ever multiplying horde of bone-eating creatures before the mutant monsters kill everyone on the island and spread like a deadly plague across the entire planet! This chilling horror film is directed by the talented Hammer Films veteran director Terence Fisher (Horror of Dracula, The Curse of Frankenstein, The Mummy).