Blank Rooms

There’s corundum by the door
I wonder what it means
I open the door
And it’s just a blank room

Is every room like that?
Now I’m curious
I check every room
And indeed it is

Or is it a red herring
That corundum is red
So I checked everything
And I found nothing

So at that time I left
I grabbed the corundum
And when I got off the property
I felt a gust a wind

I turn around to see
What happened behind me
The house was engulfed in flames
I ran away from the scene