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.

Young boys, hardened by their tough home lives, end up committing crimes. Harjunpää is called to examine a water body, who turns out to be a victim of an assault, and is still alive.

The young boys who see mentors in professional criminals and freestyle wrestlers continue their path of crime and violence. A discovery of a second body leads Harjunpää and Nykänen to a heartbreaking conclusion to the case.

The mental health of a start-up-millionaire gets shaken by identity theft. Harjunpää and Nykänen are assigned to the case which confuses them, as the thief's objective appears to be creating mischief.

The millionaire feels the pressure from the hackers and slowly loses his mind. A blackmail message arrives from the mischief-makers, and the victim decides to take the law into his own hands.

Shocking news from home causes a disruption in Harjunpää's concentration on a case, where a series of homicides come into light around the Helsinki-area. Someone arranges dead women's bodies on their beds.

Elisa's condition becomes critical; Harjunpää's panic rises; at work, following in the footsteps of the male sex workers, Harjunpää and Nykänen discover terrible things.

Timo is worried about his father living alone now that he has memory issues. A new, older colleague at work is openly unhappy about joining the team. Dark crimes kick off in Helsinki.

The homicide squad are hot on the trail of the architect’s killer. Bingo’s frustrations boil over, Onerva’s affair is developing, and Timo knows he must find a solution to his father’s difficulties.

A party ends in terror when a gang open fire, killing a well-known rapper. Timo is worried about Pauliina.

Timo and Onerva hunt for the gang’s connections and backgrounds, while investigating the deaths of members and bystanders. Timo suspects that Pauliina is hanging out with the Espoo gang.