When Carver Nash, a military hero and ex-Army Ranger, retires from international combat, he moves back to his farm in Marion, Utah as far from notoriety as he can get. Then one day, while trying to remove a stump from his field, he discovers an ancient-looking box containing Spanish gold and an encrypted message divulging a trail to the Lost Rhoades Mine. While Carver wants nothing to do with the gold or the quest, his neighbor, a history buff named Rylan Edison, believes the document is real and recruits his daughter, Cassandra, to decipher the message. Threatening messages and multiple near-death experiences don't deter the trio as they embark on a quest to solve the clues left by Thomas Rhoades in order to solve one of treasure hunters' longest standing mysteries.