An unconscious woman, a victim of an assault, is located in Munkkiniemi. Harjunpää is assigned to the case, which seems to be linked to other attempted assaults that have been reported in the area. Harjunpää gets a new partner, Onerva Nykänen.
When two of the victims of the stalker die, Harjunpää and Nykänen are spurred on to catch the perpetrator. The lonely and desperate ambulance driver dwells in misogyny and plans vengeance.