A mystical murder has been committed in Aunt Fortune's shelter! A guard dies mysteriously, leaving a bloody message on the wall. This first institution in Britain, where monster children and humans are raised together on equal terms, has witnessed a bloody retribution. Percival Fortune, the new owner of the shelter, hired the famous detective Malva, night from distant Ukraine. There are rumors that Malva was brought up in the same shelter. But can the detective find the killer in a place full of her own nightmares?