Nebulus

A man investigates a space behind a wall in my parents house. It is a vast dark space, filled with an old railway line (dream sign).
He can be heard playing a large grand piano he finds there, nice accoustics.
He searches in a land that is cold and dark, the earth a kind of grey clay. He is unconcerned and swims in dark waters, wearing a wet suit.
Eventually he finds an old half ruined city. He is high up on some buildings, down below is darkness. One building, with the upper storeys tiered, smaller, is covered in millions of tiny gold objects.
He shows us this using a camera attached to a tube and a light, much like something used for nonenvasive surgery.
The gold he says is not wanted by anyone these days, people only want silver.
I begin plans to get hold of the gold, gaining access via a chimney. At work I make excuses and change into normal clothes and start the search. G shows me what he has found. A first room is cleared of obstructions by lowering all objects to the ground.
My father hands out large banners he is giving a tutorial about something. Meanwhile my mother is trying to wind an old silver carrage clock, with delicate silverwork. I turn the key and it opens magically at the top, an unfurrling of metal work, revealing a secret for me.