Slightly turn left from the place where you're standing and move towards the entrance which is on the left side. Turn left and move forward until you reach a wall in front of you. Now, turn left and walk in the passage till you reach a wall in front of you. From here, turn left and you can see a staircase. Walk all the way up through the stairs until you reach the closed door in front of you. Now, turn behind and you can see a small passage. Walk in the passage by passing through the portraits on the right side, move until you find an opened door in front of you. From here, turn left and you can see an another opened door, enter into the room. Slightly turn left and move forward and stand in front of the sink and that is the end point.