I hit bedrock at the bottom of a Minecraft shaft and find myself in a basement packed with memories. Trunks full of old tapes of my grandparents speaking. Old vinyl records and toys I had long since thought were thrown away. But sitting in a corner is a box of nuclear materials from when my mum was building a nuclear bomb.

I break through the ceiling to see that I'm in the attic of my parents house. But outside, we are in another place, at the top floor of some alpine retreat.