“The world is full of mystery and wonder,” Paddy had always said. But when he disappears without a trace, Liz is certain her best friend is in danger. Will anyone believe her? And there is something unnatural and sinister about the apartment building in which they live. Sinister sounds vibrate through the walls. Eerie shadows flit through the hallways. Curious events occur. Liz is convinced that there is something horrible here, and it lives at 99 Crowley Close.