From the introduction:
Like everyone else, you are linked to the world around you. An unbroken line extends back to everywhere you have been. Each event, each location; a node forever tying you to that place.
You are driven to find something. You push past the borders of the known, searching.
And when you return home, there is a little less unknown in the world. Fewer mysteries. But still you seek.
You have a lead. Finally. The search has led you here, to the entrance of the maze. You have made your preparations. You are ready.