Arson is suspected when a house burns to the ground following a gas explosion and a man and a woman are found dead. Wallander and the Ystad police investigate and uncover an intricate web of lies, betrayal and secret love affairs.

When Manfred Stjarne is stabbed to death outside the Brada cider factory his wife Claire has inherited - suspicion falls on Polish worker Jan Kowalski,with whose wife Manfred was having an affair but Jan is found hanged - later evidence suggesting foul play. Benjamin Wilkes,an ex-psychologist who helped Manfred select redundancy candidates,is killed in the same way as Manfred,putting disgruntled ex-Brada employees in the frame but a third slaying implicates a former patient of Wilkes,who has connections to the Stjarne family. A newly loved-up Isabelle and Pontius start to fool around whilst on surveillance,taking their eye off the ball and allowing this suspect to confront Claire.

Isabelle and Pontus pass out as police officers but he is dismayed when she says she wants to put their affair on hold in order to travel.Her plans are cut short when she joins the investigation into the death of her friend from the gym,Therese,murdered by burglars. Therese's loser ex-boyfriend Fabian is in debt to very heavy people and offers them her jewels but is he the killer? Violent boxer and ex-con Patrik Lippowski,a former lover of Isabelle,who fled from him and changed her name from Rebecka to Isabelle to escape him,is another suspect,but he is murdered with Isabelle's gun. In finding the killer Pontus's love for Isabelle is put to the test whilst Wallander advises Katarina when her bitchy teen-aged daughter starts stealing.

Corrupt businessman Filip Pasolic stands trial for bringing illegal workers into Sweden and using them as slave labour. Wallander is injured by a car bomb intended for Kristina,who is prosecuting Pasolic and she is given police protection. At the same time pressure on the illegal Lithuanian work force to re-build Ystad's recycling centre in time for it to get an E.U. grant results in two men being killed,one of whose little sister,Natalia,sees construction manager Zoran bury the corpses. She goes to the police and implicates Zoran but takes off again with Zoran in pursuit. Wallander can link Zoran to Pasilic and needs to find him before he gets to Natalia in order to strong-arm him into testifying against Passilic. He also has to dissuade Katarina from resigning as,due to witness intimidation,the case is going against her.

Kurt returns to work after a temporarly suspention. At the same time a girl disappeares which draws in the entire Ystad police and military looking frantically for her. When Kurt starts to work on the case, he begins to see similarities to a case he worked on ten years earlier, which hit him very personally.

A young woman arrives at the Ystad police station to report her mother missing. Soon afterward the mother is found near the family home. Ystad police end up in a situation that constantly stirs up new topics, while police suspect that the father is the culprit. On a personal level Martinsson becomes increasingly worried about Kurt as he is starting to get more and more problems with his memory.

It's almost Christmas and Kurt is troubled by his memory disease. He realizes that it will soon be necessary to tell his colleagues and the rest of the world that he is sick. But he finds it difficult to give up his job, his only identity. In Ystad, there is a brutal kidnapping of a famous restaurateur, Paolo Salino. Kurt takes on the case but is forced to enlist the help of his colleague Jenny from the police in Malmö.