You are in the bathtub. You can see a door straight. Pass through that door. There is a walkway. Go straight passing through the two chairs. You can find a staircase. Take the stairs and go up. Now, go straight passing through the portrait on the right side of the wall. Go straight, you will find an open entrance to the washroom. Pass through the wash basin and go straight and there you will reach an end point at the corner of the washroom.