SOMETIMES IT'S SIMPLY ABOUT GOOD VERSUS EVIL.
 
Everything takes place in the cold and dark Vosges forest.

Deep beneath the trees, two teenagers are found dead, their bodies branded with a black triangle. It was an anonymous message that alerted the authorities. The Strasbourg Criminal Police dispatched Commander Max Keller, a discreet and silent cop. As a child, he was a reliable friend; as an adult, he has become a remarkable investigator, known for his integrity and perseverance.
 
North of the same forest, Pierre Martignas lives in a remote chalet. Considered one of the most brilliant criminologists of his generation, he has cut himself off from the world since his last forensic investigation ended in tragedy.
The terrible fate of these two teenagers will, however, bring him out of retirement.
 
These two fighters for Good, Max the outstanding cop and Pierre the expert, each plunge into this dark affair, armed only with intelligence, instinct, and determination. Facing them is an inscrutable killer or killers, embodying the worst of human nature...