Exploring a sewer near his home, David Hamilton encounters Alphonsus Tooms, a mysterious old man who warns him that the Forces of Chaos have targeted his neighbourhood, Trentham. A supernatural steam engine takes David to meet the long-deceased Duke of Sutherland, who gives him the key to a hidden library. Here he finds a book containing a mirror in its centre. Thereafter, David and his new friend Helen are flung into a series of fantastical...