JW now lives in exile and is more than ever determined to find out what happened to his missing sister Camilla. Every trace leads him to the world of organized crime in Stockholm. Jorge is about to do his last score – the largest robbery in Swedish history. But during the complicated preparations he meets a woman from his past – Nadja. Martin Hägerström is chosen to go undercover into the Serbian mafia, in order to get its notorious boss Radovan Krajnic behind bars. When an assassination attempt is made on Radovan, his daughter Natalie is pulled into the power struggle within the Serbian mafia.

In the search for reconciliation with his past, Sami ends up in a small town where he meets Kim. They both meet the local gangster The Old Man who runs a seemingly sophisticated methamphetamine empire together with his two sons Conny and Kenneth. At first, everything is peace and joy, but when drugs start circulating in the town without Gubben's permission, attention is drawn to the newcomer Sami, who realizes that he is in a dangerous situation. To stay alive, he must quickly make a plan.

The Hip hop group Kartellen is one of Sweden's most controversial bands. Here, the members present their chaotic history of musical success, substance abuse, crime and political controversy.