The gate slams shut behind you as you enter the settlement, and masked figures begin pouring from the buildings around you.
They do not bother with your compatriots outside of the gate, and you are knocked off your feet by the tide of grabbing, clubbing, fighting hands, pulling you down, and then back onto your feet with disorienting speed.
One of them has a mask, spare, from the looks of it, or taken from one of their dead, and places it over your face
(mental save)