When Carver Nash discovers an ancient,looking box in his field containing Spanish gold and a message divulging a trail to the Lost Rhoades Mine, he wants nothing to do with it. But his neighbor, a history buff named Rylan Edison, believes the document is real and recruits his daughter, Cassandra, to decipher the message. A series of clues lead the trio through life,threatening perils as they embark on a quest to solve one of treasure hunters' longest,standing mysteries.