Twenty-year-old Agnes has been subjected to abuse for a long time. She confides in a midwife who has started a secret Facebook group called Ullsaxen. Agnes tells her story, and at last she finds understanding.
Meanwhile, suspected but acquitted rapists and sex offenders begin falling victim to an anonymous killer. The men are found naked, with the name Erinya carved into their skin. Beside the bodies lies a wool shear that has been used to mutilate them.
Maria Wern's colleague, Jarita, must endure yet another trial when the men who raped her appeal their conviction to the Svea Court of Appeal. This time, one of the men goes free-but he would have been safer behind bars.
Maria and her colleagues receive reinforcements at the station in the form of Ragnarsson, nicknamed 'Ragnarrök,' from the national crime unit on the mainland. But he hinders the investigation, and Maria begins to suspect that he is protecting someone-or that he may be involved himself.
