When Johan and his colleagues are watching Seth and his gang member Jack, they stumble on a larger case than they expected. Seth is selling arms to terrorists, but without Jack's knowledge, in a car where Johan's old colleague Pernilla mysterious appears. While Johan begin researching what Pernilla and SÄPO is doing, Jack suspects that everything is not right with Seth and that he's working with the police. Written by Movietajm.se

It's been two years since John Falk and Frank Wagner broke their cooperation and Frank started working undercover with the police. Frank's search for Kevin crosses Johan's investigation and opens up a new collaboration between them - with the big difference being that this time it's personal for Frank.

The unknown, large mafia organization is now showing its true face. The pressure that GSI and John Falk and his family have put on the organization, makes them fight back on all fronts. The rule book is thrown out. But to go after Johan Falk's family, to try to kill his wife, could be the biggest mistake the organization has done. GSI closes up around Johan's family, and the final battle begins.

Johan Falk is with the wife of a dead mob boss down to Latvia to try to solve a mystery that has eluded him for three years. What Johan finds downstairs in a cottage outside Riga shocks not only himself but also the Gothenburg police special unit GSI 's new chief Sophie Nordh and the former chief Patrik Agrell. At the same time a Latvian mafia group is picking up hidden and forgotten Soviet military containers from the water-filled pits nearby. Containers filled with weapons. And everything is heading to Sweden! At the same time most of the original members of the Rydellgang are being released from a long prison sentence.