At my grandfather's birthday gala, my father grabbed my eight-month-pregnant body and sent me down a flight of granite stairs because I refused to give my seat to my sister after her cosmetic tummy-tuck.

I stared at the black screen, Richard’s final words echoing in my mind like a dark curse. They think Grace is the key to the master ledger...

I called Mark immediately. "Mark, where are you?"

"I'm at home, Sarah," Mark’s voice sounded calm and reassuring over the line. "Grace just had her bottle and she’s sleeping peacefully in her crib. The private security team is stationed at every entrance. We're completely locked down."

"I'm coming home right now," I said, grabbing my coat.

When I reached our suburban home twenty minutes later, two armored SUVs were parked in our driveway, manned by former military personnel David Miller had hired to guard our perimeter.

I rushed inside, instantly going to the nursery. Grace was sleeping sweetly in her white wooden crib, her tiny fist tucked under her chin, blissfully unaware of the storm raging in the adult world around her.

Mark stepped into the room, holding a thick, black courier envelope.

"This arrived five minutes ago, Sarah," Mark said softly. "It was hand-delivered to our front gate by a private courier service."

"Is there a return address?" I asked.

"No," Mark shook his head. "Just your name written in silver ink."

I took the black envelope and stepped into our study, setting it on the desk. Using a letter opener, I sliced the top edge open.

Inside was a single card made of heavy black cardstock. Embossed in gold on the front was an intricate emblem: a serpent wrapped around an hourglass.

I opened the card. Inside was a brief message written in elegant calligraphy:

Ms. Sterling,

Your father was a weak thief, but you have proven yourself to be a woman of rare resolve. The ninety-two million dollars you surrendered to the authorities was merely paper. What we seek cannot be seized by federal agents.

Your daughter carries the Vance-Sterling genetic encryption code created by your grandfather thirty years ago—the key to our global vault network.