Rachel Kirby is a computer genius whose personal life is falling apart. While her beloved younger sister is dying of a rare illness, Rachel is running out of time to connect the intricate pieces of a technological puzzle that will keep her alive. When a call comes from thousands of miles away, she is shocked to learn that a mysterious man named John Tavak has unearthed a stunningly important secret in an Egyptian tomb. It's a discovery that humankind has been seeking for centuries?one that may save the life of Rachel's sister and many thousands more. But a powerful enemy is also in white-hot pursuit. Desperate to protect Tavak's find, Rachel adds her own cutting-edge expertise to his, joining forces?across three continents?to bring to light an ancient civilization's amazing legacy. As their lethal adversary draws closer, Rachel and Tavak will face murder and deceit at every turn as they race to unravel a 4,500-year-old secret?before it is lost to the ages.