You are facing a wall, turn slightly right an you'll see a staircase going down. Walk all the way down the stairs. You will see another staircase going down on the left and an opening on the right, walk towards the right side opening. Step in through the open white doors. Turn slightly right to see an opening next to the painting on the wall, walk towards the right side opening. Turn slightly right and you'll see a bath tub, take a step towards the bath tub and stop.