Commander Raphaëlle Coste visits the police records bureau and meets the brilliant but unsettling young Astrid, who gives her a helping hand.

When a lawyer collapses in a courtroom, Raphaëlle and Astrid start an investigation which leads them to a house filled with supernatural phenomena.

When a famous writer is found dead, the duo starts an investigation on the trail of a tragic fire that could be the source of a Machiavellian revenge.

Astrid and Raphaëlle find out that the dead body discovered after the collapse of an underground gallery is that of an 80 year-old alchemist.

When a man collapses on a bus, possibly killed by an extremely contagious disease, the duo ends up confronting the leader of an eco-terrorist group.

After the president of an autistic association dies mysteriously, a new corpse is found. Though officially deceased days earlier, he is a suspect.