Lowen the Dark Man – a ghost from the planet Khariton who possesses human hosts – has captured Theo, imprisoned the Red Man, and has turned almost an entire city into his army of Sleeper Devils. Wyn and Ms. Crystobal have planned a daring rescue attempt for Theo and the Red Man, but they cannot pull it off without the help of Mary Paige, the young Blood Vivicanti with the photographic memory. Although she no longer has any desire to drink blood, she uses all her remaining Blood Memories to help her friends break into Lowen’s Black Building. But the Kharetie ghost has plans of his own for Theo, much to the surprise and sorrow of Mary Paige.