Bertel Kjeldsen calls Dahl late at night to ask her to come to Fredensborg where he allegedly killed his own wife. In the meantime, the case of Britt Hjort Jespersen is brought up again as a poor autopsy of the body wasn't satisfactory. DNA samples from a new autopsy show DNA from another man. Dahl tries hard to find Keldsen, who is standing at the edge of a tall building when Dahl finds him. He tells how he killed his wife and how his son, Knud Kjeldsen, killed Jespersen. Dahl arrests Knud. Knud lies under questioning, but the DNA samples show that Knud's biological brother, Robin Hansen, who is mentally retarded, was the murderer. Knud tried to cover for his retarded brother to spare his family.

When local crime boss Bob is found murdered in his own S&M dungeon in a custom made monkey cage in Fredericia, the unit is involved in a case of revenge and jealousy.

An entire family is brutally murdered and the case leads the unit into a tragic story of incest and violence.

Jette Møller is found murdered in a fish boutique in Vordingborg. Finn Møller, her husband, is taken into custody, but nothing is gaining out of his answers. Her phone is tapped and when a suspicious phone call remind Fischer and La Cour about Strangers on a Train, Møller is put under surveillance. He escapes when he sails from Vordingborg to an island. The following day, the body of Putte Bech Lorentzen is found in a sauna. Unit One suspects Larsen and arrest him. Through evidence found in the garden of Bech Lorentzen, Unit One arrests Bertram Bech Lorentzen, the husband of Putte, for the murder of Jette.

A young girl is found murdered on Bornholm and the unit is quickly involved as it looks like the work of one of Denmark's infamous serial killers, known as The Indian; unfortunately, the story spins into a personal tragedy for Ingrid.

La Cour gets one of his visions and finds a murdered student at one of the most prestigious boarding schools in Denmark, this involves the unit in a case where they finally get clues to find the serial killer known as The Indian (because he cuts the pubes off his victims); meanwhile, Ulf has bad news for the team.

The Indian has kidnapped Gaby, and La Cour and Fisher is on their tail, IP is trying to protect The Indian's ex-girlfriend who are also the murdered student's sister; this dramatic episode was supposed to be the end of the series, but as you can see below, two episodes were added later.

When a black prostitute is found murdered and things indicate the Danish minister of justice, the unit is once again called together, although they are all busy with other work; soon we learn that things are not what they seem and we venture into the Danish biker scene.

Things are taking a turn for the worse when both Johnny and Fischer find themselves in grave danger; their cover has been blown and the bikers want them dead. This episode marks the end of the series.