The City of Amsterdam is gripped with fear. A series of brutal murders have left homicide detectives baffled. With no motive or clues to work with, they find themselves probing blindly through the city’s dark and violent underworld. But Inspector Pieter Van Dijk is not convinced this is the work of one lone psychopath. Drawn deeper and deeper into the shadowy heart of the case, he unearths a terrifying history of family madness and occult conspiracy echoing across the decades.