Grijpstra and De Gier investigate the death of a fellow police detective whose corpse is missing its right arm. They search for the culprit in a brothel. The detective's parter visits the police station and turns out to be an old mentor of Grijpstra. De Gier's fear of commitment plays up when he and Hetty are looking for a house to buy, prompting her to leave him- and the police station- for good.

Grijpstra and De Gier investigate the death of an unknown young man found naked in the canal. Grijpstra's investor has gone bankrupt, to his dismay, and refuses to tell why. When the investigator, who turns out to be corrupted, is murdered, Grijpstra becomes a possible suspect. Hetty's replacement doesn't stay long.

De Gier catches a shoplifter and is confused when the cashier ignores her stealing. Later, the shoplifter is found murdered. Possible suspects include homeless drug addicts and a social services worker. The commissioner introduces Hetty's permanent replacement- Juliana 'Jazz' Wilson. De Gier's cat Olivier is severely ill after eating bad cat food, and he resorts to Jazz's uncle- a medicine man- for help.

Grijpstra and De Gier investigate the murder on a call-girl. One of her clients is a writer whom De Gier, who is writing a book of his own, admires.

Grijpstra and De Gier investigate the murder of a teenage girl. They try to look for clues in her e-mails, and are told by one of her girlfriends that she was on a date with someone she met on-line. One of the suspects, psychopath Graa Heerkens, is aggressively pursued by Grijpstra- he is the one who drove his son to drug use.

Grijpstra and De Gier escort a transport car containing a member of a drug cartel, when gunmen attack them and rescue the cartel member. In the gunfight, De Gier accidentally shoots a hot dog seller. Ridden with guilt, he puts his own life at risk to find the cartel member and his rescuers.

Grijpstra and De Gier investigate the murder on a beautiful club singer, and meet a scheming cosmetic surgeon.

With De Gier on holiday, Grijpstra must work together with Cardozo. They deal with an unconscious stabbing victim who was brought into a hospital by her husband. De Gier is at the beach with a girlfriend, and believes he has finally found a woman he wants to commit to.

Grijpstra is threatened by a gang of teenagers who steal his gun. Ashamed, he doesn't tell anyone. Later, one of the teenagers is found dead, having been shot with Grijpstra's weapon.

When her son Miles doesn't come home, Jazz learns that he has been kidnapped. She almost tells Grijpstra, but then receives an e-mail ordering her not to tell 'her police friends'. While a desperate Jazz anxiously waits until the kidnappers tell her what they want her to do, a suspecting Grijpstra and oblivious De Gier investigate a murder which may be related to her family nightmare.