In The Face Of The Unknown

Greeny and White Shirt stand right in front of the "Unknown". This place, or rather portal to somewhere else, is situated in the end of the main hall, where kids live, and is surrounded by complete darkness

Since the further you go in the unknown, the higher water levels are, children are afraid of going there.

That's why noone really knows, what's in complete darkness. Some kids hope that they can find parents there, or food. Or maybe a different country