Few years later, Nigel Manson, a successful actor comes to Dartmoor with his wife and buys Trerice Manor, now lying in desolation. Nigel is smitten by the house and gets is restored. He invites his impresario, Frank, and his co-actor/mistress, Natalie, to spend the weekend with them. Nigel is sitting on the window ledge, of his splendid house getting photographed by his beautiful mistress who is standing at the ground below. Mrs Manson, Frank and the village doctor are in the same room as Nigel, suddenly Nigel is propelled out of the window and he cracks open his head on impact with the ground, Nigel immediately dies. Witnesses in the room, and Natalie claim that there was no one behind Nigel neither could he have slipped, so how did he fell? Witnesses claim that they felt that he was pushed from the ledge by an invisible man.
Dr Alan Twist, the famous criminologist and Inspector Archibald Hurst are called in to Dartmoor. The moors where legends of hell hounds, murderous invisible men and the red devil do the rounds in the local inn with rounds of beer, where legends and macabre tales are interwoven in the lives of the people. Twist and Hurst have to now lift the veil of superstition and catch the demon of Dartmoor before it strikes again.