In the mist veiled valleys of West Yorkshire, where the cobblestones whisper secrets of the past, two siblings are about to discover that their home town is anything but ordinary. When a mysterious glowing book and an ancient key fall into their hands. The boundary between the everyday world and a realm of shadow and wonder begins to dissolve. Guided by a cryptic tale the children must navigate the narrow ginnels and steep hillsides of Hebden Bridge yo unlock a mystery that has been hidden for centuries.