Jovan Siladji

A car explodes in front of a primary school where GSI boss Patrick Agrell has just left his children. The event reunites Johan Falk with Leo Gaut, a former criminal restaurant owner who Johan put behind bars a decade ago.

John Falk is on a routine mission with the Gothenburg police special unit GSI. With the help of a Norwegian undercover police and a civilian infiltrator in one of Gothenburg's heaviest criminal gangs, the GSI are trying buy six assault rifles and thus get them off the street. But suddenly everything changes when a new unknown player suddenly and immediately wants to buy not only those weapons but even more, including armor-piercing shells. GSI realizes that this can not be any ordinary robbers. Someone will start a war on the streets of Gothenburg. At the same time as the situation gets more and more complicated for John Falk's infiltrator Frank Wagner when the leader of the gang he infiltrated realize that one of his own leaking to the police.

When a female prosecutor pursuing a case against one of the country's most dangerous motorcycle gangs is targeted by a bomb attack, the media carousel grows and the police are now accused more critically than ever of not being able to crack down on organized crime. But the police are more active than the media can imagine. The police leadership orders the unit whose sole task is to work against the most serious organized crime – the Special Operations Group – to deploy all available resources. But the nightmare is a fact when it emerges that the attack originated in the very methods that the police leadership sanctioned, and more attacks are in the works...

Frank Wagner goes deeper undercover to infiltrate Europe's most dangerous Mafia, the Russian-est, consisting of ex - KGB officers.

Johan Falk and his colleagues at the GSI go after sex traffickers importing young women from the East and forcing them into prostitution.