Newgrange - older than Stonehenge, older than the pyramids - has held its secrets for thousands of years. A place of worship, where ancient man prayed to the gods, Newgrange was also a tomb, a place to bury the dead... and not all the dead were human. And now Patrick Elliot and Claire Holland have unleashed one of the House of the Dead's most malignant evils. It began with a practical joke that went wrong. Patrick and Claire are on a school trip to the ancient monument. By chance they set in train a series of events that will threaten not only their own lives but also the very existence of the human race. They have released the creature known as the Great Evil. Now they must defeat it, but what chance have two teenagers against the ancient magic?