Tizzie's unpredictable lifestyle with her feckless mother has brought her to Roven Mere, a mysterious, rambling, isolated, lonely house She and her mother are expecting to be greeted by Lord Rupert and his daughter, Greta But when they arrive only the staff are in residence Tizzie presses the reclusive Finnigan for clues as to Greta's whereabouts, but he only answers in riddles Gradually, however, Tizzie unscrambles the clues and learns all about the history of the house and its inhabitants - and with it, the astonishing truth as to why she has been brought to Roven Mere