A well-known arms dealer is found dead in his mansion. He was killed with four shots to the stomach the night before. Marion falls victim to violence against aid workers. Romeo suspects a man they gave a ticket earlier that day.

A girl with a barcode tattooed on her arm is found dead. It appears that she was murdered in a horrific manner while on the run. The DNA of an old acquaintance is found on her body: Louis Dearden, president of the court of assizes. Wolfs and Eva visit Lies Dewulf and, with some difficulty, manage to get hold of Louis Dearden's laptop. Later, a second girl with a barcode tattooed on her arm is found. She was being held in a house near Maastricht, along with several other girls. Wolfs and Eva go to the house, but everyone has fled. Unexpected help comes from a Hungarian liaison. Marion finds her sister, who has returned. The sister looks very similar to Marion. Inside, however, they are worlds apart.