There's a place, out in North Wales, where things have happened. Bad things, strange things. Dark things. At the heart of it there's a mountain, and they call it Mynydd Du: Black Mountain. A long time ago, I knew a guy called Rob Markland. He was a writer. He was, I suppose, a friend. Last year, I met him again; he was a patient in a psychiatric ward. The doctors wanted me to help them find out what had happened. I found a file of Rob's notes. It was about Mynydd Du and what surrounded it. I read it, and I found out about Maes Carnedd and Capel Teg, Britt Nordenstam and Russell Ware. And much, much more. And if I was really unlucky, I'd find out what drove Rob Markland insane. Now it's time to tell the tale. So turn the page. The dancers in the pines are waiting for you... on Black Mountain.