Take the left branch
You peer around the corner, and see an elevator at the end of the
hall, now closed. You tap on the buttons nearby, but none of them open
up. There is, however, a keyhole cut into a notch on the side of one
of the panels.
You do so, going down a long hallway dotted with locked unopenable
doors. You start to hear boots clicking on the tiled floors you had
not noticed before, so duck into a doorframe as the steps come closer.
At last, though, the person in them opens a different door and steps
through, closing it with a slam.
