Should you find yourself in need of a discreet investigation into any sort of mystery, crime or puzzling circumstances, think of Jesperson and Lane . . .

For several years Miss Lane was companion, amanuensis, collaborator and friend to the lady known to the Psychical Societs only as Miss X - until she discovered that Miss X was actually a fraud. Now she works with Mr Jasper Jesperson as a consulting detective, but the cases are not as plentiful as they might be and money is getting tight - until a case that reaches across the entirety of London lands in their laps.

It concerns a somnambulist, the disappearance of several mediums, and a cat stuck up a tree . . . the links with the cat are negligible, but there is only one team that can investigate the seemingly supernatural disappearances of the psychics and defy the nefarious purpose behind them. Jesperson and Lane, at your service.