Search through the floor

You walk around and look at everything that could be helpful. But except of dust and a bit of toilet paper in the employee bathroom you find nothing. However you now can clearly hear that somebody is one or two floors upstairs. You hear the sound of a table which is moved over a wooden ground.

Then to your joy you spot a stair behind a corner. It leads to the second floor and seems to be unguarded. You go up carefully at first you can see nobody. The second floor looks exactly like the first one. But then you hear steps. They come close to you. Slowly and quietly. Whoever is there maybe hasn't noticed you by now. You immediately hide behind a desk and wait. Soon you can see who is there.