Concourse

The concourse is the ending point of Chapter 3-3 and the starting and ending point of Chapter 3-4.

Chapter 3-3
Entering the room, a cutscene will commence in which Luis arrives with the plaga egg, only to be killed horrifically by Osmund Saddler. After the cutscene, you will notice that Ashley is on the lower level of the room stuck to the trap that caught her in Chapter 3-1. Release the clamps by shooting the metal out with a weapon - preferably the sniper rifle. After Ashley is released, protect her from being kidnapped by the monks. When the monks are all dead and the key out of the room is recovered, the chapter will end.

Chapter 3-4
In this chapter, Ashley will leave this room in order to find a way upstairs, where she will join Leon on the upper level.