Simon is a liar. Stella and Alex know this about their new stepbrother, so they aren't bothered by his stories about their new house. Wildwyck, a former schoolhouse for misbehaved boys, might have plenty of creaks and shadows, but the twins know that ghosts aren't real. But Simon is getting harder and harder to ignore, as his cries for attention become increasingly dangerous and difficult to explain. Stella and Alex have to consider . . . could Simon actually be telling the truth? .