March 1244. The fall of Montségur brought the last Perfect Cathars to the flames. In the City of Carcassonne, the Inquisition hunts down those who remain. You are Beatriz, younger sister of Esclarmonde, a Perfect Cathar. Before fleeing the City, your sister sent you a letter — nine stops across town, nine childhood memories that only you can recognise. No one else can read what she left. Every step of the way, Esclarmonde hid a number in the very stones: a detail she taught you to see, a sign she showed you as children, a number hidden in a place you two shared. At the end of the road, in the Basilica of Saint Nazaire, lies a chest. The nine digits form the combination. Inside: one of the last Cathar gospels, the Liber, which Esclarmonde saved from the flames. Start at Porte Narbonnaise. Every step of the way, read your sister’s words, observe what’s around you, and find your number. At the last stop, your nine digits will form the combination. You'll have three attempts.