In 1994, the Swedish engineer, entrepreneur and adventurer Malte Stierngranat was buried in a pyramid that he had designed himself. Carol is contacted by the cleaner George in the middle of a cold Swedish winter. This leads her on a journey in which she has to delve into Malte Stierngranat's illustrious life and his legacy.
These days the Chestnut Lodge Asylum is abandoned and forgotten, but many years ago a terrible tragedy unfolded behind those rusty gates. Every year, patients disappeared from the asylum without a trace. Neither the nurses nor the police could find any clues. But one day, everything changed.