The unit is created by chief public prosecutor Bilderdijk, when a case of child smuggling seems to be only the small piece of an organization. As one of the members of the team, public prosecutor Adrienne Rieding, is being threatened anonymously, she is reconsidering joining the unit.

Ben Govers and Harry Bresler are researching the kidnapping of an illegally adopted baby. District attorney Adrienne Rieding decides, even though the threats, stay with the unit and has a meeting with an informant called Anna. Ruard Talsma investigates who's behind the threats to the address of Rieding.

Ben Govers meets Katja van Dijk with whom he starts a relationship. The unit tries to seek a connection between a case of women trading and Scylla. Adrienne Rieding's husband, Paul, becomes deadly injured when his wifes car is being shot at.

Russo Brink is being interrogated about an informant and his relation to Scylla. The informant has been professionally killed however. Meanwhile Bilderdijk wants to disband the unit, due to insufficient results. Then Adrienne discovers the deceased woman is not the informant she spoke to. It also gets clear that employment agency Hermes is quite possibly a link to all the happenings.

The second art robbery takes placed in connection to Scylla. Via a security agency the unit discovers two names of important persons who could bring them closer to Scylla. One of them leads them to a ship where a large number of paintings are hidden. Question still stays what the connection to Scylla. A dead women is identified by Adrienne as her informant.

The central part of employment agency Hermes is getting clearer. Rebecca de Leeuw goes undercover at Hermes and gets the interest of director Veenstra. She break in to the office, but can't extract the crucial details. When police men enter the scene and arrest Veenstra, all the employees and take possession of the office material, the computer with the important information explodes.

Veenstra, director of Hermes, is freed from prison by Scylla and unit 13 decides to shadow Hermes employee Elly. Ruard Talsma discovers Paul Rieding is on the payment bill of Scylla under the name Chiffon, he tries to discover what it means. Meanwhile Paul dies in hospital.

Ruard Talsma is investigating who could have used the name "Chiffon" and who's the leak within unit 13, who leaks the information straight to the department of justice. He suspects Rebecca is the leak. The unit does a search on a vacation resort, where they find heroine and a bazooka. An employee of Scylla offers Adrienne's daughter Josien hard-drugs.

Scylla-employee Stef Suurbier is being interrogated, but says nothing, because he is being blackmailed. Rebecca seems to have leaked information to Bilderdijk, but doesn't get fired. Under hypnoses she remembers the names on the secret list of employment agency Hermes, with which the unit tracks down the name of Scylla headman Louis Gerlach. A dealer is ordered to give Josien Rieding some special pills.

Adrienne discovers the name of Gerard Ruysdaal, the one who knew the name Chiffon. Josien Rieding gives the pill she was given to a friend, who than has an overdose. The dealer is caught, but before he gets the unit in contact with Scylla employee Charon, he commits suicide. Katja van Dijk, lover of Ben, seeks contact with her employer Scylla, because she wants to quit.

It's discovered Bilderdijk has a connection with Ruysdaal, one of the leaders of Scylla. Arthur discovers the information of Ben's computer is being monitored by Scylla and he finds monitoring equipment in his home.

Bilderdijk receives pictures of his affair with Rebecca, with which Scylla is trying to blackmail him. Meanwhile Scylla on its guard and tries to escape unnoticeable. Laywer Gerlach gets arrested at a bank, this brings the unit closer to Scylla. Katja, Ben's lover and informant of Scylla, gets a necklace from Ben, in which a bug is placed.

Adrienne shows Bilderdijk a picture on which he and Ruysdaal, one of the two leaders of Scylla are shown together. He assures her he is not the leak to Scylla en he suspects it is Swager, a liaison between the minister and himself. He promises he will keep an eye on him. The Scylla network is rolled up in a bloody confrontation.