When her colleague and lover Sven disappears, police detective Hanna takes over text message contact with an infiltrator he had placed in a criminal organisation who goes by the nickname 'Inez'
Hanna and Bjorn are on the kidnappers' case, but their attempts to rescue Sven are foiled. Christian becomes ever more involved in the Mimica clan's business, but a new assignment nearly shatters him.
Suspecting a leak in the department, Hanna, Bjorn and their boss Tina create a clandestine group to investigate and reduce the risk of their infiltrator 'Inez' being harmed. Christian is threatened.
Hanna, Bjorn and Tina now know there's a mole among their colleagues who reports everything to the Mimica crime family. But who is it? Davor Mimica opens contact with the Mobsters motorcycle gang.
Stefan has figured out that his girlfriend Blanka is cheating on him with Christian and he's on the warpath. Hanna is determined to meet her infiltrator, but 'Inez' doesn't show up to the meeting.
Now that Hanna knows her own son is 'Inez', the police infiltrator within the Mimica crime family, she wants to get him out right away and close the investigation. Christian, however, has other ideas.
The net starts to close on Christian. Davor is informed by his police source that there might be an infiltrator within the Mimicas' organisation. Stefan follows Christian and makes a big discovery.
Christian is on the verge of a total breakdown after what happened to Stefan. A shocked Hanna and Bjorn decide to break the investigation off and bring Christian in, but Davor has other plans for him.
Hanna, Bjorn and Tina have now cracked what Operation Krajina is all about: the Mimica crime family are going to smuggle enormous quantities of drugs into Sweden. Blanka makes a terrible discovery.
When Hanna and her fellow police officers arrive at the boathouse where the drugs are supposedly being taken ashore, she gets a text message that changes everything. Blanka faces a difficult choice.