While visiting his hometown, cop Nikolai investigates a local man's apparent suicide, but he grows wary while questioning the people last seen with the victim.
Nikolai plants evidence to support the suicide theory, but he later learns the real story behind Tommy's death; surveillance footage points to a suspect.
Anniken suspects the blood on the fence was planted; Nikolai gets an old friend to lie for him; Lars meets misfortune while trying to cover his tracks.
As Anniken closes in on Ove, Bengt and Nikolai try to direct his escape; divers search the river while forensic experts comb through Ove's houseboat.
Ove's girlfriend visits the station to speak with Anniken; realizing he must stop Bengt, Nikolai goes on the offensive, but Bengt strikes back hard.
The drug dealers capture Bengt, resulting in an unexpected turn of events; Lars confesses to the police; Nikolai is given a new piece of evidence.
Eva asks Josef to do one last drug run from Sweden to pay his debt to her; monitoring phone activity for coded texts, Nikolai prepares to make a bust.
Eva decides to get rid of all loose ends linked to her drug operations; Nikolai learns the whole truth about his father's connection to Tommy's death.