Stuck in overture.

[NeatNit]

Actually I'm replaying Overture and just reached that part, so you're in luck, I can tell you exactly!

Spoiler below!

Go look at a map of that area. They're scattered all around. You need to reach the room in the lower-right corner of the map. Once you get there, look around and you'll find that you can only go to the spider tunnel on the right. Go forward, turn left, and keep going forward till you reach a locker room/changing room. Probably some spiders will follow you so be ready to kill them. Now, look for a note on the seats in the middle of the room. Read it, you should be able to figure out the rest!