Hanna Alsterlund

Johan Falk's stepdaughter Nina has gotten in contact with her biological father, Orjan, discovering that he is in debt to an Estonian construction company in Gothenburg, leading to Nina's kidnapping.

A group of young robbers, specializing in robbing shopping center security guards, are raging through out Gothenburg. A robbery goes awry when an innocent passerby is killed. Ricky, the gang's young leader, tries to quickly find an expert who can clean the money of the dye pack that exploded while Johan Falk, and his colleagues at GSI, accelerate their hunt.

Falk is blackmailed into smuggling a truckload of guns from Latvia.

Five men break into Frank Wagner's apartment. Frank is able to escape and seeks out the help of Johan Falk. Has someone leaked that Frank is working with the police? Frank and John don't know who knows what and whom to trust.

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 that this time it's personal for Frank.

It's a beautiful day in Slottsskogen, Gothenburg idyllic city park, when suddenly the unthinkable happens - gunfire amidst all people. Two gangsters shooting game against each other and a large police operation starts. The conflict grows rapidly to involve several gangs from Gothenburg underworld. GSI switched to try to identify a new thread which proves to be both larger and better armed than any other. The only clue is a tattoo on one of the killed gang members.

GSI follow up a weapon trail that leads right into Kavkaz mafia headquarters on the west coast. GSI member Niklas Saxlid is the one in the group who is specialized in undercover operations, and he has penetrated Kavkaz' activities. But suddenly something happens and Niklas disappears.

GSI second in command, Sophie Nordh, flips gangster leader Seth Rydell and convinces him to infiltrate a rogue military group. For the first time GSI Chief Patrick Agrell realizes that he is using a ruthless psychopath as an infiltrator. Can Seth be trusted or does he have his own agenda?

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 and trying to kill his wife could be the biggest mistake the organization has ever made. GSI closes up around Johan's family and the final battle begins ...

The police station is locked down. A snitch is compromised. Drastic and unexpected events take place. Both inside and outside the police station.

Johan Falk hasn't been working for over a year since he resigned from the police. Most of all he wants to move out to the countryside, but fate has a different thought.

After causing a commotion with his last assignment, Falk has been given a desk job, which hardly agrees with his personality, and he ends up accepting an offer from an old friend to buy into a private investigation agency. Another friend of Falk's, Sven, purchased a business in Estonia, and when local gangsters attempted to pressure him into paying protection money, Sven retained the services of Nikolaus Lehmann, a burly private eye, to throw them off his trail. However, Lehmann does his job all too well, murdering the racketeers, and then threatening Sven and his family. With no where else to turn, Sven asks Falk to help him deal with the crazed Lehmann; Falk agrees, but soon realizes he's dealing with a more dangerous man than he imagined when Lehmann kidnaps Falk's wife Jeanette, and then releases her with a time bomb locked around her neck, demanding that Falk hand over ownership of his detective agency to Lehmann.

Johan is a two-fisted Gothenburg cop who finds himself in a shoot-out with jewel robbers. After the smoke has cleared, one robber, shot by his accomplice, and an innocent bystander, are dead. Three witnesses, including Helen, identify thug extraordinaire Leo Gaut as being the dead crook's trigger-happy colleague. Gaut soon threatens the three witnesses, and only Johan, the badge-wearing hero, can save them.