During the Bandits mission, you'll need to save a woman from being raped near the beginning, as well as rescue some other hostages later on, all of which must be done without raising any alarms throughout the mission.
Check out the video below for a full playthrough of the game showing all collectibles, miscellaneous achievements like this one, and the Moral Points I obtained (I skipped a lot of them) in order to get the Redemption achievement. The Bandits mission starts at timestamp
53:16.