DEEP IN WESTERN IRELAND’S RUGGED landscape, in the sleepy town of Kilmaine, two brothers decided to build a house. But first, John and Tom Mooney had to find construction materials. According to a story passed down for generations, John came upon an old, forgotten lios, a medieval ring fort made, conveniently, of suitable stones. The next day, the brothers started pulling out the bushes that grew along the fort’s walls. As they cleared the overgrowth, they thought they heard the echo of someone crying, but shrugged it off and kept working. When a local priest noticed what they were doing, he warned them to leave the fort alone—but the brothers were undeterred. As dusk gave way to evening, the brothers finally stopped their work and returned home. By morning, both John and Tom Mooney were dead. A week later, as he was walking past the fort, the priest fell and broke his leg. Locals knew the tragic events were no accident—the fairies were to blame.