De Cock and his team investigate the murder on a generous woman who offered help to people in need of it. There is a key witness, but he has Down Syndrome, which De Cock knows will render his testimony useless in court.
The Amsterdam taxi business is shaken up by the murder on a driver. De Cock and his team investigate, and discover that he was in a fight with an unlicensed co-worker.
De Cock and his team are in for a mysterious case when an unknown man is found dead in a car graveyard. The murderer appears to be a pro, but De Cock begins to doubt that theory after a second corpse is found.
De Cock and his team investigate the murder on a man who was poisoned with a cup of coffee. They discover a list of women he was dating at the same time.
De Cock and his team investigate the murder on a red-haired woman, and discover that there is a serial killer at work. Buitendam decides to call in an expert from outside the team, which only makes tensions rise even higher.
Lucrative Amsterdam dating service manager Caroline Hulst is found in her garage, a poorly staged monoxide-suicide. Suspects are her ruthlessly greedy partner Gerda Sieben, ex Marcel de Haan who has custody of their pre-teen daughter and two men who reacted to her contact ad: restraining order-slapped 'stalker' Jacco de Ridder and businessman Willem Groen. All lied about motives and/or alibis.
Watchman Jochems' niece is found murdered, and a distraught Jochems tries to help De Cock and his team during the investigation, only making things more difficult. De Cock worries when Jochems disappears.
De Cock and his team investigate the murder on an old woman who turns out to be a witch- a Wiccan, to be precise. Suspects include a high priestess and an Ethiopian priest whose name is drawn in blood near the corpse.
The leader of a controversial right-winged political party is found shot in the head in his office. De Cock and his team investigate, and are told to look for the culprit amongst left radicals and foreigners.
De Cock and mob boss Adriaan de Koning meet again when Adriaan's son is murdered in a sex club. De Cock races to find the murderer before a vengeful Adriaan does, and his frequent visits to the Amsterdam underworld quickly cause co-workers to eye him with suspicion. Worse, his determination to solve the case could cost him his life.
