A psychopath is terrorizing Copenhagen. His calling card is a "chestnut man" - a handmade doll made of matchsticks and two chestnuts - which he leaves at each bloody crime scene.
Examining the dolls, forensics makes a shocking discovery - a fingerprint belonging to a young girl, a government minister's daughter who had been kidnapped and murdered a year ago. A tragic coincidence - or something more twisted?
To save innocent lives, a pair of detectives must put aside their differences to piece together the Chestnut Man's gruesome clues. Because it's clear that the madman is on a mission that is far from over. And no one is safe.