A doctor of psychology whose talent for piercing people has proven its worth, Adèle Zimmer joins the federal police to work as a consultant on unexplained missing persons cases.

But behind her commitment, Adèle aims to take advantage of her new position to access her son's file, mysteriously disappeared 6 months ago, and thus relaunch her own investigation. However, his task will be complicated by the presence of his colleague Inspector Dosco.

He is an impulsive professional with rigid principles; Adele, on the contrary, adopts unorthodox methods in order to carry out their investigations. This improbable duo, which everything opposes, will nevertheless have to collaborate to get out of the most unexpected situations.