Nell Young's whole life and greatest passion is cartography. Her father, Dr. Daniel Young, is a legend in the field, and Nell's personal hero. But she hasn't seen or spoken to him ever since he cruelly fired her and destroyed her reputation after an argument over an old, cheap gas station highway map. But when Dr. Young is found dead in his office at the New York Public Library, with the very same seemingly worthless map hidden in his desk, Nell can't resist investigating... An ode to art and science, history and magic.