Raphaëlle and Astrid take an interest in a former resident of the mysterious house, a woman who murdered her entire family there 24 years ago.

A Natural History Museum employee is found dead at the foot of a dinosaur skeleton. Not a drop of water on the horizon and yet, the victim drowned.

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.

A woman is murdered, but the main suspect was in prison at the time of the events. The duo quickly realizes that it is the work of a serial killer.