Chapter 16 - The Chase Through the Core

We hit the stairwell door just as another silenced bullet pinged off the metal frame, embedding itself deep into the concrete wall. The emergency stairwell was pitch black, lit only by the faint, pulsing green glow of floor-level exit strips.
"Down!" I shouted, pulling Marissa down the steep metal steps as our footsteps echoed like thunder in the enclosed space.
We descended four flights of stairs in a blind panic, our lungs burning from the cold, artificial air. Jonathan’s heavy footsteps pounded behind us, descending with terrifying speed. He wasn't just a corporate executive; he was moving with the cold, calculated efficiency of a man who had cleaned up the Whitmore family’s dirty work for decades.
"Where does this exit lead?" Marissa whispered fiercely, pressing her back against the concrete wall as we paused on the landing of the third floor.
"The loading dock service tunnel," I panted, my heart hammering against my ribs like a trapped bird. "If we can reach the maintenance vans, we can get out to the main highway."
"No," Marissa said, catching my arm with an iron grip. "If we go to the loading dock, we're walking straight into an ambush. Eleanor’s guards are stationed at every exterior exit."
"Then what do we do?"
"We go up," she replied, her eyes flashing with absolute, terrifying resolve. "To the roof. The emergency helicopter pad. Nathan told me about an auxiliary maintenance ladder that drops down to the adjacent roof on 5th Street."
Without waiting for me to argue, she turned and bolted back up the stairs toward the roof access door, moving with an agility that left me breathless. I cursed under my breath and followed her, our boots clattering against the metal steps as Jonathan’s footsteps grew louder below us.
We reached the heavy roof door, threw the latch, and burst out into the cold, torrential rain of the Boston night.
The wind whipped across the open skyscraper roof with blinding force, driving sheets of freezing rain directly into our faces. The city skyline stretched out below us like a sea of neon ghosts, obscured by swirling banks of fog.
We ran toward the edge of the helipad, searching frantically for the maintenance ladder. But before we could reach the parapet, the heavy roof door slammed open behind us.
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Jonathan stepped out into the rain, his suit jacket soaked, his pistol raised and rock-steady despite the wind.
"End of the line, Adrian," Jonathan shouted over the howl of the storm.