Gothwrain and Sherisha have activated the last sigil of their curse, and now Gar and Sheila have only a day to live if Julia and Dr. Diggers can't destroy it! Fortunately, Dr. Diggers finds a back door into Gothwrain and Sherisha's soul-seal: their daughter, Lydia. But catching Lydia, the new Overlord of Darkholme, isn't going to be easy!