The Chestnut Man: A Novel

Naia Thulin is one of the novel’s two protagonists, a sharp, ambitious young detective in the Copenhagen Major Crimes Division. As a round and dynamic character, she undergoes a significant professional and personal transformation throughout the investigation. Initially, Thulin is defined by her desire to leave the homicide squad, which she views as technologically outdated and professionally stagnant. Her goal is to secure a transfer to the prestigious cyber-crime unit, a motivation that initially causes her to view the Chestnut Man case as an obstacle to her career ambitions. Thulin is a single mother to her daughter, Le, and she carefully compartmentalizes her life, keeping her demanding job separate from her parental responsibilities and avoiding deep emotional attachments, as evidenced by her casual relationship with her boyfriend, Sebastian.

Thulin’s investigative approach is methodical and evidence-driven, which initially brings her into conflict with Hess’s more intuitive style. She is intelligent, pragmatic, and highly competent, excelling at processing digital evidence and pursuing logical leads. At first, she dismisses Hess’s theories about the Kristine Hartung case as a distraction, preferring to focus on more immediate suspects like the victims’ partners. However, her defining trait is her intellectual integrity and her inability to ignore a puzzle once it has been presented. As the evidence begins to support Hess’s seemingly outlandish connections, her skepticism gives way to a grudging respect and, eventually, a formidable partnership. Her technical skills become important in cracking codes and analyzing digital footprints, perfectly complementing Hess’s psychological insights.

Thulin’s development is marked by her growing investment in the human element of the case. Her professional ambition is gradually supplanted by a powerful drive for justice, particularly after she uncovers the horrific child abuse at the heart of each murder. This shift is solidified when she volunteers to act as a decoy to catch the killer, a decision that moves her from a detached analyst to a front-line participant willing to risk her own life. By the novel’s conclusion, Thulin has abandoned her initial goal, having found a renewed purpose within the Major Crimes Division. She has formed a deep professional bond with Hess and allowed the case to breach the walls she built around her personal life, signaling a significant shift in her character and priorities.

Simon Genz is the primary antagonist of the novel, the brilliant and helpful head of the Forensics Department who is revealed to be the serial killer known as the Chestnut Man. His character is built on a foundation of dual identity: The respected public persona of Simon Genz conceals the traumatized and vengeful Toke Bering. As a round but static character, his motivations are fixed in his past, and his actions are the culmination of a meticulously planned, decades-long scheme of revenge. His psychological trajectory begins at Chestnut Farm, where as a young boy he was forced by his abusive foster parents to make chestnut dolls while his twin sister, Astrid, was sexually assaulted. This horrific experience serves as the psychological genesis of his entire pathology, linking the act of creating chestnut men to extreme trauma and a feeling of powerlessness.

After escaping the farm, Toke Bering is adopted by a wealthy benefactor and reinvents himself as Simon Genz. This transformation sees him weaponizing his intellect and channeling his trauma into a cold, calculated rage. He uses his new resources to excel academically and eventually infiltrate the police force, rising to a position of immense power within the Forensics Department. This role gives him the perfect cover and the necessary tools to execute his plan: He can manipulate evidence, steer investigations, and remain above suspicion while carrying out his murders. His crusade is a chilling manifestation of The Ethics of Vigilante Justice, as he targets mothers whose children are victims of abuse that the social welfare system has failed to address. He sees himself as a punisher, delivering a brutal form of justice that the official system is incapable of providing.

Everything Genz does is deeply symbolic. He leaves a chestnut man at each crime scene, a direct reference to his own past and a taunt to the authorities. The mutilation and amputation of his victims is a grotesque re-creation of a chestnut doll, transforming his targets into life-sized effigies of his childhood torment. His ultimate target is Rosa Hartung, whom he holds personally responsible for a childhood lie that led to him and his sister being sent to Chestnut Farm. The entire series of murders is an elaborate prelude to his final confrontation with her, revealing that his seemingly righteous campaign against negligent mothers is, at its core, an act of deeply personal and monstrous revenge. Genz’s character is a dark exploration of how trauma, when combined with high intelligence and systemic access, can curdle into a uniquely terrifying form of evil.

Rosa Hartung is a deuteragonist whose personal history and professional life are inextricably linked to the Chestnut Man’s motives. As the Minister for Social Affairs, she is a public figure, but the narrative focuses on her private grief following the supposed murder of her daughter, Kristine, a year earlier. Rosa is a round and dynamic character, whose journey is one of confronting past and present trauma. When the novel begins, she is attempting to move forward by returning to work, but the discovery of Kristine’s fingerprints at the new crime scenes challenges her recovery. She is portrayed as a woman of immense strength and resilience, but also one haunted by a hope she dares not entertain.

Rosa’s character embodies the novel’s critique of systemic failures. Ironically, she is the political champion of the very anonymous whistleblower scheme the killer exploits to find his victims. This positions her as an unwitting accomplice in the system Genz seeks to punish. Her true significance, however, lies in a repressed childhood memory. As a foster child herself, she once lived with Toke and Astrid Bering. A childish lie she told resulted in the twins being removed from that safe home and sent to the abusive Chestnut Farm. The killer’s entire crusade is ultimately an elaborate act of revenge directed at her, making her both a symbol of the system’s failings and the personal target of its most damaged product. Her discovery of the chestnut wreath on her doorstep forces this long-buried memory to the surface, providing the final key to the killer’s identity and motivation.

Her transformation is marked by a shift from denial to a desperate pursuit of the truth. Initially dismissive of her husband’s belief that Kristine might be alive, she eventually embraces the possibility, which gives her the strength to defy the political pressure to remain silent. Her ordeal culminates in her own horrific torture at Genz’s hands, a brutal punishment for her past actions. In the end, she is a survivor, mutilated but reunited with her daughter, serving as proof of both the lasting scars of trauma and the possibility of redemption.

Linus Bekker is an important red herring and a foil to the true antagonist. Convicted of the murder of Kristine Hartung a year before the novel’s main events, he is a young man with a history of sexual offenses and paranoid schizophrenia. His character is defined by his paraphilic obsession with death and crime scenes, which leads him to illegally hack into a police archive of forensic photographs. It is this morbid curiosity that makes him an ideal scapegoat for Simon Genz.

Bekker’s role is not that of a simple, wrongfully convicted man. He is a willing participant in Genz’s deception. While viewing the police archive, he discovers the 1989 Møn case photos, which include the image of a basement filled with chestnut dolls. He becomes fascinated by this unknown killer’s signature. When a chestnut doll is later found in the background of the evidence photo of the machete planted in his garage, Bekker understands he is being invited to participate in a larger, more brilliant criminal plan. He confesses to Kristine’s murder because he admires the real killer, the “master,” and wishes to be part of his legacy. His conversations with Hess and Thulin are manipulative and riddling, designed to mock the police while preserving the mystery of the Chestnut Man. Bekker’s complicity highlights Genz’s genius for manipulation and complicates the search for truth.

Steen Hartung, Rosa’s husband and Kristine’s father, is a man consumed by grief and a desperate, unyielding hope. While Rosa initially tries to channel her sorrow into her work, Steen is unable to accept his daughter’s death, especially since her body was never found. He experiences alcohol addiction and embarks on his own private, methodical investigation into her disappearance, poring over maps and canvassing neighborhoods. It is Steen who first insists that the fingerprints on the chestnut men must mean that Kristine is alive, a belief that Rosa initially dismisses as a symptom of his grief. His public appeal on television for Kristine’s return directly challenges the official police narrative and puts his family at odds with the government. Although his actions are driven by emotion rather than evidence, his refusal to give up hope is ultimately validated, and his faith is a critical emotional anchor in the narrative.

Nylander is the head of the Major Crimes Division and is a bureaucratic antagonist to the investigation. He is a static and flat character, motivated primarily by political expediency and the public image of his department. He is consistently more concerned with managing the media and appeasing his superiors than with pursuing inconvenient truths. Having built his reputation on closing the high-profile Kristine Hartung case, he is openly hostile to Hess’s attempts to reopen it, viewing the new evidence as a threat to his career. He repeatedly obstructs the investigation by denying resources and refusing to authorize interviews with Rosa Hartung. His leadership style exemplifies the institutional inertia and self-preservation that allows a killer like Simon Genz to operate undetected from within the very heart of the police system.