If you're after completing this achievement ASAP, open the spoiler. If you are after enjoying the story without spoiler, just continue playing as you would and this will eventually unlock.
*** Spoiler - click to reveal ***
You will obviously start this episode where the previous one left off. (Jesse fell down a hole). Start by following the orange line, optionally checking out all kinds of stuff on your way. You will be introduced to a prison. Very shortly after, Jack will appear and you will attempt to escape. You will encounter all kind of creatures on your way. Simply follow the QTE's which appear every now and then. Eventually, you will get to know the real size of the maze and one of the golem guards will take you back to the prison.