"When Sean Wyatt receives a cryptic message from an old friend in Paris, he’s drawn into a mystery tied to one of the most iconic figures in history—Joan of Arc. A long-lost journal has surfaced, one that may reveal the final resting place of her most powerful possession: a ring said to carry a divine energy. But when his contact is murdered before he can share the full truth, Sean and his team are left to unravel a centuries-old trail of riddles, symbols, and hidden catacombs beneath Europe’s ancient cities."