How to unlock: talk to Brother James in Charles View Amphitheater (M6,10)
This is not a quest, in the full sense of the word, information on its starting, or ending, does not appear in your journal, but it is worth mentioning. In Charles View Amphitheater, you find Brother James, who wants you to join the Pillars of the Society. After a short conversation, if you agree, he will take you to his office. There, he tells you to give all your belongings (literally all) to the society. After you do, he chases you out and leaves you completely defenseless.
If, after the conversation, you do not agree on the terms and leave, you will be attacked by all of the cult members. With high Charisma, you can talk your way out of the deal and leave in peace. After you kill all of the cultists, they appear again, after you start quest Emogene Takes a Lover. In the location, there is nothing interesting to loot and the more valuable items are several watches and golden lighters.
Rewards for completing the quest: None