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.