An English nanny, drowned. A great house and a labyrinth that hides more than it would seem. A new challenge for Inspector Requesens. On 19th July, 1909, Elsie Thornton, nanny to the Devalls family, appears floating, dead in the great washing copper the day following the reception which was celebrated in the Orchard Labyrinth park, on the family estate. Because the victim is a British citizen, Ossorio, the governor, orders that it has to be Ignasi Requesens, and his inseparable assistant, Cristobal, who take charge of investigations. What, at first sight, seemed to be no more than an unfortunate accident, becomes more complicated when the autopsy reveals that Elsie was pregnant. Nobody realised she was in a relationship and, in another twist, it appears that someone gave her a dose of laudanum shortly before her death.