“What?” Marco’s voice dropped into a register I had never heard in the twelve years he had served as my security chief

The private elevator car descended into the subterranean depths of the estate with a smooth, silent hum.

Marco stood beside me in the dim lighting of the car, his broad frame encased in a matte-black tactical vest over a dark turtleneck. His hands moved with practiced mechanical precision, slapping a fresh 30-round magazine into the housing of his suppressed submachine gun and racking the bolt with a sharp, metallic clack.

I didn't carry a gun in my daily life. I didn't need to. In my world, money, lawyers, and leverage were far more lethal weapons than lead. But tonight, standing in the cold metal box as it sank toward the concrete belly of my own home, I reached into the hidden wall compartment of the elevator car and pulled out my personal firearm—a heavy, customized Sig Sauer P226 that hadn't seen the light of day since my private security days in Europe before I built Vance Enterprises.

I checked the chamber. Loaded.

“Sector 4 leads directly to the old utility drainage lines running beneath the Chicago riverbed,” Marco said, keeping his eyes fixed on the digital floor indicator above the door. “If someone had the blueprints and an insider's access card, they could bypass every surface sensor on the estate without tripping a single alarm.”

“Sarah had the blueprints,” I said. “She helped me redesign the security grid when we bought the property.”

Ding.

The elevator car came to a gentle halt. The heavy steel doors slid open with a soft hiss.

The sub-level corridor was bathed in the harsh, flickering red glow of emergency backup lights. Water dripped from the exposed overhead pipes, pinging rhythmically against the concrete floor. The air smelled of damp earth, old iron, and burnt gunpowder.

We stepped out into the hallway, moving in a tight, coordinated two-man wedge.

Marco took the lead, his weapon raised, his boots silent against the wet concrete. I followed half a step behind, my eyes scanning the deep shadows stretching between the massive structural pillars of the foundation.

Fifty yards down the corridor, sprawled across the floor near the entrance to the maintenance tunnel, lay one of my night-shift guards.

“Hold,” Marco whispered, raising a fist.

We approached the fallen man cautiously. Marco dropped to one knee, checking for a pulse while keeping his weapon trained on the dark opening of the tunnel ahead.

After a second, Marco looked back at me and shook his head grimly.

“He’s gone, boss. Shot clean through the chest. Suppressed round at close range.”

A cold fury settled deep in my chest—not the hot, blinding anger of a provoked man, but the glacial, surgical rage of a predator whose den had been violated.

“Move,” I said.

We stepped past the fallen guard and entered the subterranean maintenance tunnel. The concrete walls gave way to rough-hewn stone and brick arches dating back to the late 19th century—the original foundation of the estate before I had rebuilt the mansion above it.

A hundred feet into the tunnel, the beam of Marco’s tactical flashlight caught a flash of movement around a sharp corner ahead.

“Stop right there!” Marco barked, his voice echoing off the stone walls. “Drop your weapon or you will be terminated!”

A figure in a dark hooded jacket darted out from the shadows, sprinting deeper into the labyrinth of utility pipes.

“Don't let them reach the river exit!” I shouted, breaking into a hard run behind Marco.

We chased the shadow through the damp, winding corridors, the sound of our boots splashing through standing water shattering the dead quiet of the subterranean ruins. The intruder was fast, moving with an eerie, rehearsed familiarity through the pitch-black tunnels.

Suddenly, the figure rounded a massive concrete drainage junction and disappeared behind a heavy iron service door that led to the private dock on the riverbank.

Marco reached the door first, kicking it open with a brutal snap of his boot.

The heavy iron door slammed back against the stone wall.

We spilled out into the pouring rain.

Standing on the private concrete dock, drenched by the storm, was a single figure holding a heavy canvas duffel bag.

Lightning flashed across the night sky, illuminating her face in a brilliant, stark white light.