During the carnival, the body of a girl is found near Bellinzona. Leonardo Blum and his team will find themselves investigating crimes that have their roots in a past full of shadows. The crimes that bloody the city will not be examined only, but also and above all the human soul, that of a community that believes it has nothing to hide.
It's the end of peak season at the French winter station Les Cimes. Vacationers leave, the snow melts, and reveals a woman's corpse in an intriguing and macabre staging.
Swiss captain Sterenn Peiry is tasked with the case and rapidly joined by French investigator Lyes Bouaouni, who investigates another case in which the victim was found in a similar staging.