Move forward from the place you are standing, turn right and move forward, now you are facing towards the sink right now, slightly turn to your left and move a bit forward, turn right, enter into the third room which is to your right, you can find staircase to your left and a closed door to your right, enter into the area which is to the right side of the staircase, you can find portraits to your right, move towards the opened door which is infront of you, stand infront of the wash basin, that would be your end point.