Left with bald patches thanks to the wicked doings of a murderer from a previous investigation, Agatha flees to coastal Wyckhadden to re-grow her lost locks. With hair tonic supplied by a local witch, Agatha's tresses begin to flow - but the witch is found bludgeoned to death. The odd elderly residents of Agatha's elegantly faded hotel seem innocuous on the surface, but as she delves deeper she discovers secrets best left undiscovered and powerful motives for revenge. Balancing the amorous attentions of police inspector Jimmy Jessop with an ever more treacherous search for the killer, Agatha is at her wits' end - and ready to cast a spell of her own.