Chapter 15 - A Mysterious Final Warning Arrives at the Private Foyer

Midnight wrapped the Washington penthouse in absolute stillness as soft moonlight poured through the reinforced glass windows.
Julian and Clara were reviewing final restructuring briefs in the executive study while the city slumbered below.
Suddenly, the secure digital intercom system near the private elevator lobby chimed with a soft, electronic alert.
Julian walked quietly out to the foyer, checking the live-feed security monitor displaying the elevator entrance.
There was no person standing before the camera, but resting squarely on the marble welcome mat was a small black envelope.
He unlocked the heavy double doors manually, stepping out into the hallway to retrieve the mysterious package.
He brought it inside, locking the deadbolt securely before opening the thick paper flap under the desk lamp.
Inside was a single printed photograph of the penthouse balcony taken from an angle outside the building.
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Scrawled across the back of the photograph in dark red ink was a chilling, unexpected final warning:
“You caught Arthur and cleared your name, Julian... but you never checked who really holds the clearance codes to the satellite grid above this city.”