The body of a female is found in a Copenhagen park. Shortly after, an ex-soldier who served in Afghanistan is killed. Are the murders linked? Only one person can help: DI Sarah Lund.
Sarah Lund finds a connection between the murdered woman and Raben's soldier friend, Allan Myg Poulsen. Meanwhile, Raben runs amok when he learns that his application for release has been rejected.
Ex-soldier Raben is on the run and he looks up a former army chaplain who gets him in contact with yet another ex-soldier, Kruger. They meet, but Kruger wants nothing to do with the past.
Gruner is found dead, bound to his wheelchair. Now there are only two members of the squad left, Raben and Lisbeth Thomsen, whose whereabouts are unknown.
Sarah Lund and Strange travel to Sweden to question and protect the only other surviving member of Raben's former army squad. But Raben himself is on the same mission.
Against Strange's advice, Sarah arranges to exhume Per Moller. She's convinced there's no body in the coffin, because he's been sighted three months after his death. But the coffin isn't empty.
Sarah has found the chaplain, who's wounded and she pursues the perpetrator. But she's attacked by him and barely survives. Meanwhile, Raben is still on the run, but Special Branch is watching him.
Raben is in intensive care after having been shot by Strange. He still insists that Strange is the murdering officer, Perk. Under interrogation, Strange admits to having been in Afghanistan.
Sarah Lund and Ulrick Strange are in Afghanistan on a mission to track down the killer. Pressing on with the investigation back home, Brix decides to conduct a search at the army barracks.
Sarah Lund and Ulrick Strange return from Afghanistan with new, conclusive evidence, while Brix and his team are looking at what appears to be an important finding in the investigation.
