The silence of the eighty-eighth floor was never absolute, but at 4:14 AM, the character of that silence underwent a violent transformation. In the master suite of the Manhattan penthouse, a low-frequency hum began to vibrate through the floorboards—not the familiar thrum of the climate control, but the rhythmic, insistent pulse of the "Obsidian Alert." It was a sound that had been programmed into the firm’s global system years ago but had never actually been heard outside of a simulation. It was the sound of a systemic structural decoupling.
Hana sat up in bed before the first chime had even faded. Her heart hammered a frantic, irregular rhythm against her ribs, a physical manifestation of the data variance she could already sense in the air. Beside her, Ethan was already moving, the blu
