Luther's promise of tutoring Karl Schumacher in exchange for his labor was the chance of a lifetime, until a poster on the church door declared his master a heretic! Karl is asked to travel with Doctor Luther to appear before the emperor's Imperial Council in the city of Worms. Will his life be at stake as well as Luther's? And who is the mysterious young lady who shadows their trip? Could she be a spy for Luther's enemy, Doctor Eck?