Tandem S06E02 - Le droit chemin

Brother Francis is found dead outside the gates of his abbey. What was this novice doing outside in the middle of the night ? Paul finds in his cell a bible filled with strange annotations and a diagram that evokes the Tear of Saint Louis, the legendary lost diamond. Would the younger brother have found the relic and killed it to get it back ? Or is his murder linked to his strange past, as Leah seems to think ?