Alina Railo joins an expedition to Finnish Lapland, seeking access to a parallel universe potentially holding solutions to the climate crisis. Her late father initially investigated this universe before vanishing there decades ago.
The Chestnut Man is set in the quiet suburb of Copenhagen, where the police make a terrible discovery one blustery October morning. A young woman is found brutally murdered in a playground and one of her hands is missing. Above her hangs a small man made of chestnuts. The ambitious young detective Naia Thulin is assigned to the case, along with her new partner, Mark Hess. They soon discover a mysterious piece of evidence on the chestnut man-evidence connecting it to a girl who went missing a year earlier and was presumed dead - the daughter of politician Rosa Hartung.
This series is based on an original idea by best-selling Danish novelist Elsebeth Egholm. It follows the inquiries of a special unit at Copenhagen's police force, consisting of detective inspector Katrina Ries Jensen (Laura Bach) and forensic psychiatrist Thomas Schaeffer (Jakob Cedergren). The pair specialise in serial killers that do not fit within traditional behavioural patterns.