Well, the game is an open-ended sandbox where every player gets to write their own story.
Even if you include lore and meta, the experience varies so much on an individual level that it'd be near impossible to come up with a definitive movie script.
Version: [42.xx]
Mode: [Singleplayer]
Mods: [None]
Save: [New Save]
Reproduction steps:
1. Spawn in Ekron
2. Travel to location indicated in screenshot
3. Enter house, walk up to second or third floors. Room tiles missing.
I found a house in Ekron on my current run that I planned to set up a base in. Then I fell through a gap in the floor. It very much appears that there is a missing room here, as the other rooms on the second floor don't seem to be otherwise accessible. The gap also appears on the 3rd floor attic (which I also fell down).