In the chestnut man hide and seek, Ida Cæcilie Rasmussen’s Signe is revealed as Thea, Thøger Staal’s daughter, and the killer behind the new murders. The season ties that identity to a case from the 1990s, then pushes Naia Thulin and Mark Hess back into the same investigation five years after the first season aired.
Marie Holst had been chasing answers about Emma’s death for more than two years when the case finally turned on DNA under Emma Holst’s nails. The match pointed to Thøger Staal, dead for over 30 years, but the sample was identified as female DNA, and that detail led the story to Thea.
Thulin and Hess Return
The Chestnut Man: Hide and Seek is Season 2 of the Netflix series The Chestnut Man, based on novels by Søren Sveistrup. Naia Thulin and Mark Hess return after their relationship fell apart; Hess walked away from both the romance and Copenhagen, then came back when a new case pulled him into Thulin’s orbit again.
The new murders follow a stalker who kidnaps victims before killing them, and the killer taunts them by text with a popular Danish children’s counting rhyme. That structure matters because the season is not just revisiting old wounds; it is using a fresh series of crimes to reopen the old one and make the two cases legible as one chain.
Marie Holst Learns the Truth
Marie Holst’s closest confidant, Signe, was the person standing beside her while she searched for answers. Marie then learned that her daughter had been having an affair with a married man, and that the man’s wife was Signe.
When Marie uncovered that identity, Signe used her signature taser to knock her out. The reveal gives the season its sharpest reversal: the person Marie trusted most is Thea, the daughter of Thøger Staal, and the same child who once sat in the school class that found the dead body left by her father.
Thea and the 1990s
As a child, Thea was described as bright, curious, and inquisitive, which makes the adult turn harder to read as a random villain move. The series instead frames her as someone whose past never detached from the 1990s murder that opened the season, and that link is what drives the present-day killings.
For viewers, the practical reading is simple: the case does not end with the identification of a single killer. It reorders the relationships around Marie, Thulin, and Hess, and it turns the old Staal murder into the key that unlocks the new one.
