You begin facing a wall, turn slightly to your right and go towards the staircase, stand at the end of the staircase and then go down the stairs, turn to your left, continue going down the stairs, once you get to the bottom, go into the hallway on the right, and then enter the room, immediate to your right, next to the elevator and the fire extinguisher, go towards the bed, and then turn to your right, you will see a washroom, step into the threshold of the washroom and you're done.