Witnesses

On a quiet road in northern France, 15 well-dressed corpses are found in an abandoned bus. Were they on their way to some sort of ceremony or event?

Sandra discovers a similar case: a dead man found in an abandoned bus ten years earlier. When she examines that bus, she finds a clue.

At the foot of a wind turbine, the body of a young woman is found. Her name was Virginie Drouet, and she died shortly after giving birth.

Sandra gets a call from Catherine, who has just knocked on the door of the man she's convinced is her kidnapper.

Antoine's car is found on the side of the road, at the edge of a forest. A search party is sent out to find him but there is no trace.

Sandra has lost everything. Her daughters who she doesn't see anymore, Antoine who is still missing, and the trust of Eric and her colleagues.