An elderly woman is found brutally mutilated and murdered in a nursing home in Oslo.
Minister of Justice Trine Juul-Osmundsen, Henning's estranged sister, is accused of having sexually harassed a younger, male politician.
Henning is assigned to the nursing home case, but has problems focusing on the case while his sister is in deep trouble.
Then a young girl with ties to the old woman in the nursing home is found strangled in her own apartment, and suddenly both Trine and Henning find themselves entangled into the mystery, the girl is a mutual acquaintance from adolescence.
Scarred is the third book in The Henning Juul-series.