Right now you're on the staircase facing the grill. Now turn left and step up the staircase, now turn right, you can see a portrait in front of you, move towards the portrait and turn right, you can see a walkway in front of you, move towards the end of the walkway. Now you can see an opened door to you left, move towards the door and turn left and enter in to the room. You can see a lamp on the desk to your left, move towards the lamp and slightly turn right. You can see an opened door in front of you, move towards the opened door and enter in to the room, you can see a sink in front of you, stand in front of the sink and it will be your end point.