Beck and his team investigate the murder of an accountant at an airport parking lot. Meanwhile, a reporter receives an anonymous tip regarding the embezzling of funds earmarked for repairing nuclear reactors.

Martin investigates a gangland shooting and Gunvald gets too close to the victim's widow.

Martin's loyalty is put to the test when Gunvald goes off the grid on a personal vendetta.

A paparazzi photographer is found dead, his apartment ransacked. When Beck's superior Margareta Oberg goes through the evidence, she reacts strongly to two of the images left behind, going so far as to hide them from the team.

Beck's team meets their new boss as the body of a young woman is found in a Stockholm hotel room.

Martin Beck is drawn out of retirement to help catch a suspected terrorist.

After the bodies of two immigrant boys are discovered, the police received an anonymous message from a group called the Swedish Front: "The slaughter has begun." Martin Beck and his team find a lead through a website where young boys are sold for sex, but time is running out for locating the next victim.

The mother of an autistic boy is found murdered in her home. Gunvald finds her non-verbal son naked in a closet, covered in blood and holding the murder weapon.

A journalist is found beaten to death and Beck's investigation takes an unexpected and tragic turn.

An Asian woman is found murdered in the waters of Stockholm's archipelago. Meanwhile a series of break-ins has occurred on an island outside of Stockholm, and a retired old man is discovered dead in his own yard.