Content : Tags, vandalism, illegal betting, car theft... For 16-year-old Gaspard, the time has come to face the music, as his age no longer protects him from the law. Rather than going to juvenile detention, he enters the Cold Cases Bureau, an innovative rehabilitation programme. For three months, he and police captain Ruben Arcega attempt to solve a cold case of their choosing. Rebellious, both quickly break the rules. The son of a veterinarian, Gaspard is interested in 128 old news stories, 128 cases of horse mutilation in the region... while in Toulouse, three young women are attacked. Are all these cases connected? But how?