Eddie and Jon Marks are spending the summer holiday at Silver Lake in the USA, where their parents have bought a wooden cabin next to a dese rted old house. When Eddie befriends two other boys in the area, they tell him the amazing story of the old house, Jack ‘the Devil' Devlin a nd bodies put in slabs of cement. When the boys set out to reveal the truth behind the story, they soon find themselves in the middle of a f rightening adventure.