I don't understand. I read the walkthrough.
I need toI'm lost and stuck. What I'm missing or should I do? 
Forgot. got it!
I need to
Spoiler
go through the sewers the second time. I used the plank in the room when the man is on the right plank and you need to go south. After I reached the south I found myself in another room when I need to go south but there is the baf man.
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Forgot. got it!