When a young girl mysteriously vanishes, Police Sergeant Howie (Edward Woodward) travels to a remote Scottish island to investigate. But the seemingly quiet community is not as it appears, as the detective uncovers a secretive pagan society led by the strange Lord Summerisle (Christopher Lee). While the townsfolk tempt and threaten him with bizarre rituals and wanton lust, Howie must race to discover the truth behind the girl's disappearance before his clash with Lord Summerisle builds to a terrifying conclusion - one that has cemented this cult shocker as a modern horror masterpiece.