Four Minutes, Nine Seconds

The alert came through at 11:47 p.m., and Alina Voss was awake within the second ring, because six years of consulting for First Meridian's vault security had trained her body to treat that specific chime like an emergency room code.

She was logged into the system's remote diagnostics before she'd finished pulling on a jacket, watching, in real time, someone move through her own security architecture with a fluency that made her hands go cold on the keyboard.

The outer door: bypassed in eleven seconds, using a timing exploit on the badge reader that Alina had flagged in her original design review and been told, by First Meridian's board, was too costly to fix immediately. Someone had known about a vulnerability that existed only in an internal report she'd written herself.

The second checkpoint: the biometric lock, defeated in under thirty seconds using a spoofing technique so specific, so exactly tailored to the exact make and model of scanner First Meridian used, that Alina could count on one hand the people who knew it existed. She was one. Her old mentor, Joseph Adair, was another. The third had died four years ago.

By the time she got a car to the building, the vault's inner door — a foot of reinforced steel that should have taken a skilled crew the better part of an hour with the right equipment — had been open and closed again in under four minutes, the whole breach a clean, silent, almost surgical intrusion that the responding officers, arriving eight minutes after Alina, would later describe as the most technically accomplished break-in any of us have seen in twenty years.

Nothing appeared to be missing. That was the detail that unsettled Alina most, standing in the vault at half past midnight while forensic techs dusted surfaces that would yield, she already knew, no usable prints. Whoever had done this hadn't taken the cash, the bonds, or the safe-deposit contents that would have made the whole thing a straightforward robbery.

They had taken one thing: a single sealed envelope from box 1147, registered to a shell company Alina didn't recognize, and left everything else completely untouched.

"Ms. Voss." The lead detective, a tired woman named Reyes, held up an evidence bag with a single item inside — a playing card, the queen of hearts, placed neatly on the vault floor exactly where the missing envelope had sat. "Any idea what this means?"

Alina picked up the bag with hands that had gone very steady, the particular steadiness of someone refusing to let a room see her shake.

She knew exactly what it meant. Joseph Adair had taught her everything she knew about security systems using a card trick as his first lesson — always leave one card behind, so the client knows exactly whose work they're looking at, and exactly how outmatched their locks really are.

"I need to make a phone call," Alina said. "Privately. Right now."

"Ms. Voss, we're going to need you to stay and answer some—"

"I know who did this," Alina said, and something in her voice made Detective Reyes actually stop writing. "And if I'm right about why, we don't have very long before he does it again somewhere a lot more people get hurt."