There's something beneath London.
And it's no longer staying there.
It begins where no one is looking, in the tunnels and forgotten spaces that run beneath the city, where movement goes unnoticed and problems are meant to disappear.
At first, nothing seems wrong.
Then the patterns shift.
Gaps appear where there should be noise.
Places empty faster than they should.
Something moves through the city without being seen.
By the time anyone understands what has changed, it has already spread beyond the spaces designed to contain it, reaching upward into streets, into buildings, into lives that were never meant to be part of it.
Now London is being evacuated.
Not because something is coming.
Because something is already here.
They came from below.