Agneta and Stellan Broman had just said goodbye to their daughters and grandchildren when the phone rings. The person on the other line only says one word: Geiger. Agneta grabs her old gun, kills her husband of 50 years, and disappears without a trace. Sara Nowak, an officer in the Prostitution Division, is called by a colleague who is investigating Stellan's murder because Sara grew up with the Bromans. She goes against protocol and takes part in the case, which will lead her to the time of the Cold War and the truth about her childhood.