Obtained from: Jin
Difficulty level: Easy
Reward: 6500 Exp
Return to the church
In order to return to the City Hall you have to complete the Big Daddy, Where Are You? sidequest.
After obtaining a universal key from a mayor, run down the stairs where you enter the sewers. But before it happens, a last confrontation with a Thug #1 in the City Hall awaits you. Use a back door to enter the sewers (1). A way back is very long - in the beginning it is the same as previously until the moment when you reach the junction (2). You have to go straight ahead there. Follow the map and get to one of the exits to slums (3). There are more of them in the eastern part of the sewers but the game points you to the exit marked on the map #2.
You'll exit the sewers near the church #1. Go there #2 and complete your quest.