Horizon of Darkness

There were long corridors to the left and to the right. At the end of the left corridor, there was a turn to the right, and at the end of the right corridor, a turn to the left.

Turning left, the mercenaries reached a turn to the right, made the turn, and found themselves in a similar straight corridor, at the end of which was another turn to the right. Now, everyone could clearly hear human screams.