Episode 1 “The Eyes Have It”
Two thieves break into a house and discover an eight-year old in respiratory distress. They hesitate, but end up calling emergency services. The child is in a coma. Mattei investigates into the circumstances of the poisoning that caused the child to fall ill. Suspicions veer towards the parents, but the child wakes up and incriminates one of the thieves. The Attorney General pushes Mattei to track them down, but Mattei is convinced that the father is the perpetrator. In the end, he discovers that the mother, suffering from Munchhausen syndrome, was the one who was trying to kill her son.

Episode 2 “Missing Persons”
An inseparable trio of young girls, 15 years old, are reported missing from their junior high school. Mattei is immediately convinced that the girls are in danger, and sounds the kidnapping alert to get the police force out on search. While the investigation reveals disagreements between the girls, in what seemed like the image of perfect friendship, the victims are found in the forest: one of them was attacked and left for dead; the two others, in a state of shock, can’t speak. In the end, Mattei discovers that one of the girls, jealous of the strong bond between the two others, wanted to scare her rival; but the joke took a wrong turn.

Episode 3 "The Haunting Return"
In a pretty little home in a quaint suburb, a family is getting ready for school. Suddenly, a piercing scream sounds through the house. It’s the youngest boy, who has “seen a ghost in the yard.” His father reassures him that ghosts don’t exist. To prove it, he opens the door – and finds himself face to face with Lea, a 12-year old girl with a haggard look, completely disoriented. She asks them who they are and where her family has gone. When the father, trying to calm her down, puts a hand on her shoulder, she starts yelling and fighting wildly.
It is Lea Jacquet, who was kidnapped six years earlier and has finally managed to escape. Matteï struggles to get the young girl to talk. She finally reveals that she still has “two sisters” who are back at the place where she has been kept for six years.
Two other children are still being held captive. Clara and Jonathan attempt to identify these two missing persons by age and date of kidnapping. They scan old photos and digitally age the girls’ faces to identify the two “sisters.” The fact that they have been abducted in totally different places indicates that the kidnapper is a frequent traveler.
For Jeanne, it is an urgent case. The kidnapper must be psychologically destabilized by Lea’s escape. He must be making life hell for the two surviving girls, and will be likely to kidnap another girl to make the family “complete” again.
But Lea becomes more and more shut down, and her panic attacks become more frequent. Matteï has to help her get through the trauma and free of the Stockholm syndrome. Lea comes to understand that the only way to detach herself from her captor is to see him arrested.
She accepts to act as bait to make the wolf come out of his den. She speaks to the press and media and lets her current address leak out.
The trap is set to catch the predator.

Episode 4 “Manipulations”
A teenage girl runs away from home to meet up with a young man she’s been chatting with on the Internet, but has never seen. Mattei investigates to determine the real identity of her virtual sweetheart.
And soon suspects him to be a dangerous manipulator.

Episode 5 "In the Name of the Son"
Jeremy Levasseur kidnaps his own son in plain sight of his ex-partner. Mattei and his team head up an urgent investigation to find the child right away – before his father can leave the country with him.

Episode 6 "Under Pressure"
Fourteen-year-old Romain, harassed by a gang, hurries out of high school. Suddenly, a car speeds up and hits him. The driver escapes. Mattei’s unit investigates daily teenage pressures and harassment at the school to identify the perpetrator of the hit-and-run.

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