'Ada Baker was a psychic. She was the seventh daughter of two parents who were both seventh children. And she had been gifted with some extraordinary powers.'

Ada Baker is a gifted psychic, who shares her home with three very bored ghosts. Spending their days roaming around Ada's house offers little amusement, and so the three of them convince Ada to help them investigate the mysterious death of local beauty Mary Watts, who is found naked and strangled in her bathtub. This begins a series of exciting adventures for Ada, as she draws on her unique skills to help solve this heinous crime. Along the way, she must convince a sceptical detective of her aptitude for channelling the abilities of the dead, avoid the unwanted attentions of a sinister stalker, and try to enlist the help of a squadron of ghostly spitfire pilots to save her own life.

Can the dead really bring justice for Mary and help save the living too? Will Ada solve the mystery of her murder? Or will Ada's curiosity lead to her own demise, causing her to end up as a ghost herself?