She wrote about an ancient mystery. She never expected to live it. Violet Hart has spent her life trying to be invisible. A reclusive writer with a trust fund, a traumatic childhood, and three science fiction novels that almost nobody read, she's made peace with her small, quiet existence—hiding from the world that never understood her. Then she gets an email from a stranger. Dr. Andre Cross is an anthropologist with an ancient metal disc, a cryptic riddle, and a theory that Violet's "fiction" might be something far stranger: a map. The disc leads to a rock art panel in Utah. The panel leads to a cave in Pennsylvania. And the cave leads to a discovery that changes everything. Someone has been leaving a trail across the globe for thousands of years. Sacred sites. Hidden chambers. Lessons carved in stone and light. And Violet can read them all—not because she's studied ancient languages, but because something in her has always known how. But they're not the only ones following the trail. The Order of the Serpent has spent millennia burying the Keepers of the Flame's knowledge, keeping humanity asleep. Now they're watching, waiting, determined to destroy whatever waits at the end. And they've been watching Violet her whole life. From the red rock canyons of Utah to the crystal chambers of Bosnia, from the oracle's cave in Malta to the storm-lashed peak of Mount Shasta, Violet and Andre race across the world, piecing together a puzzle that spans continents and centuries. Along the way, Violet must confront the truth about her childhood, her abilities, and the voice inside her that's always known there was more.