Research Unit

Brilliant airline captain Charlène returns early from her latest flight to an empty home. Her husband Geoffrey and their son Rodolphe have vanished. Soon after, Geoffrey's body is found in the nearby woods, but Rodolphe is still missing.

During a murder mystery game set in a historic fort, Cécile Adam is found murdered in a secluded courtyard. Every participant appears to have an alibi. As the RU investigates, they uncover a web of secrets hidden in the victim's private life.

The body of student Vanessa Pelletier is found on a beach on the French Riviera. As the RU investigates the prestigious campus she attended, they discover that the young woman had been leading a secret life, sending the investigation in an unexpected direction.

Thomas Lemoine is found shot dead at a virtual reality therapy center. After rescuing a young woman from a deadly fire, he unexpectedly began a relationship with her. But Bernier questions what really happened that night, and the investigation suggests the fire may not have been an accident.