The world is full of entrances we never question - doors, archways, tunnels, thresholds.
But something has started using them.
From abandoned stairwells that lead somewhere new, to hallways that loop into places no architect ever designed, people are walking through ordinary doorways... and not coming back the same.
Witnesses report:
Rooms that appear for one night only
Corridors that rewrite themselves behind you
Shadows that cross thresholds before their owners
Voices calling from the other side of closed doors
Portals that show skies that don't belong to Earth
Each chapter documents a real-world anomaly - the kind that gets buried, redacted, or quietly denied. A pattern is forming across continents, and the signatures match.
Something intelligent is opening these doorways.
Something patient.
Something learning.
And whatever is on the other side has already stepped through.
MIDNIGHT THRESHOLDS
A classified archive of portals, breaches, and doorways that were never meant to open.