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.