Basit Deniau's houses were haunted to begin with. A house embedded with an artificial intelligence is a common thing: a house that is an artificial intelligence, infused with a thinking creature that is not human? That is something else. But now Deniau's been dead a year, and Rose House is locked up tight, as commanded by the architect's will: all his possessions and files and sketches are confined in its archives, and their only keeper is Rose House...