A prisoner, known as the monster, refuses to speak and, behind prison bars, awaits his trial. A foreign lawyer, who came to assist him, seeks to uncover the reasons behind his mutism and the circumstances surrounding his crimes. What if there was nothing to understand? What if the madness of ordinary men had paved the way for the birth of the monster? On the trail of his client, in a country just barely recovering from fratricidal war, the lawyer is plunger against his will into the heart of tragedy.

Translation of: Comment devenir un monstre.