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.

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.

Bilderdijk is really angry because Swager, the advisor of the minister is supposed to have committed suicide. Harry is tracking down the witness called Lotti Werner. When the team appears at the meeting place of the Finnish person with the briefcase, the briefcase is taken. Further on a bomb explodes at the place where the unit is located and Lotti Werner doesn't survive the bomb attack.

The investigation into the bomb attack is being done by the state police. Ruard and Adrienne want to quit with the investigation of Scylla. A container with raw materials for plutonium is found. The girl who stole the briefcase is seen, but later on found murdered in the forest.