During a top-secret NATO operation in the Mediterranean, a Swedish attack diver is murdered. Hamilton knows the victim from his days as a Navy SEAL and travels to Toulon military base in southern France to investigate the incident.

Hamilton and Kristin go undercover to find out more information about the background to the murder. A dangerous chase, which ultimately involves the whole world, leads via the french riviera casino to exclusive villas and out into the Mediterranean.

Hamilton travels north to uncover a suspected research espionage at the Kiruna Space Project. At the same time, a lorry crosses the Swedish border via Finland. Someone seems to be systematically stealing secret weapons material from Sweden.

All information about the operation is classified and Hamilton is sent to Brussels as a bodyguard for the Minister of Defence. At the same time, a group of rebels prepares for a violent action in connection with an EU summit.

Hamilton has to leave Lykke in the middle of an engagement party, but his will to live a normal life continues to grow. Important information risks falling into the wrong hands when a scientist is kidnapped and blackmailed.

Hamilton comes home to Lykke and makes plans for the future, but first he must complete a mission that is becoming increasingly frightening. Hamilton travels to the Lithuania-Belarus border to face the terrorists.

Hamilton is self-destructive after the terrible consequences of his previous mission, but is persuaded to do what he does best. He is sent to Poland to retrieve a Swedish businessman who is sitting on important information.

Hamilton meets a woman who turns out to belong to a group of militant environmentalists. When Hamilton realizes the activists are telling the truth, he breaks with OP5 and joins the group.