You begin in the entrance to a lovely looking home, staring into a corner next to the front door. Turn left, past the extravagant looking mirror, and continue towards the vases and ferns. Once you get a bit closer, you should see a banister in an apparently downwards-leading staircase. Go towards that. Continue down the stairs that you went towards. Once you're at the bottom of these stairs, at just the last step, you're done.