Facing a staircase in front of you, move forward toward a plant in a yellow bucket. You'll see a number of rooms, with open doors. Starting at the plant count, 1, 2, 3, the 3rd entrance from the right is where you'll enter. You take a few steps into this room and turn around, exit the room. You'll continue forward heading towards the dining table, you'll pass the kitchen on your right, and just after the island with the black marble top, you'll have arrived.