A hidden chamber beneath Alexandria. Ancient fragments in Mary Magdalene's own hand. And a conspiracy that has shaped what the world was allowed to believe for two thousand years.

When seventeen-year-old Yale prodigy Ava Calloway picks up the trail her missing father left behind, she expects answers. What she finds is a secret older than the Church itself — suppressed manuscripts, hidden archives, and a network of guardians and enemies stretching from Alexandria to Jerusalem to Istanbul. Joined by Marcus Visconti, heir to a family who has protected early Christian scholarship for generations, Ava is pulled into a fight that crosses borders, tests loyalties, and fractures her own family down the middle.

Three sisters. Three sides of a two-thousand-year war over who controls the past. And a young woman who refuses to let the people who buried the truth be the ones who decide what it means.