During a home invasion, two burglars discover a child distressed and decide to alert the authorities; on examination, the boy has been poisoned and is comatose; suspicion falls in turns on the parents, the babysitter and the burglars.

A young girl runs away to meet a man she met online, but that she has never seen; Mattei intercepts the meeting but struggles to discover the predator's true identity; as he closes in, a link to an old case puts the team at risk.

After a long-fought custody battle, a father suddenly resorts to kidnapping and abducts his son right in front of his ex.

After five years of captivity, a young girl escapes her captor; before Mattei can move against the kidnapper, he and his team must get the girl to talk -- and what she says forces Mattei to look at his own past.

When Romain darts across the road in front of his school to escape pursuing classmates, a car speeds up and hits him; the driver flees, but when Mattei and his team look into the case there's more to unravel than just who hit Romain.

After a 17-year-old girl attempts suicide, she is revealed to be pregnant; at the hospital, she claims to have been raped and insists on an abortion, despite being beyond the legal deadline, and her story quickly begins to fall apart.