In 1971, two boys digging in their garden in Hexham, England, unearthed a pair of crudely carved stone heads that were small, unsettling, and unlike anything they'd seen before. What followed was a wave of bizarre poltergeist activity, werewolf like sightings, and a chilling string of events that would plague every home the heads touched. To this day, no one knows if they were ancient Celtic relics, an elaborate hoax, or something far more sinister.