Jayston Ellwood's world is turned upside down when his cousin, Bret, commits suicide. He is sent to join his archaeologist father in Ireland to help him forget. As if that's going to happen. Jay stumbles across a sky disc at his father's dig and time and history are turned inside out. He discovers a whole new side to life back in the Stone Age. Everything is so much simpler then. If only Bret could have joined him. It would have saved his life. When the Master of the Morgammera enters on the scene, Jay discovers that life isn't simple at all. The Master has the villagers in his thrall and demands a terrible price of them. When Jay finds out, he needs Bret more than ever to fight this evil. Can he use the sky disc to get to Bret in time? Can he turn it against the Master and annul his power over a cowering, superstitious people? And what of the warning echoing in his mind - Never interfere with Nature. But he does interfere with nature and his past and his present and his future merge. Jay is in for the battle of his life now and Time isn't on his side. He enters a nightmare world where he ends up fighting against himself. And if that isn't bad enough, it seems that Bret didn't commit suicide. He murdered him Can he hope to undo the damage? Can he manage to straighten things out? And if he does, where will he end up and who will he be?