The Secret of the Forgotten City

Nancy Drew and her friends embark on an adventure to uncover a hidden city and its rumored treasure buried under the Nevada desert after discovering a mysterious old gold coin. Upon receiving a stone tablet with ancient petroglyphs, they face threats from a thief who is also after the treasure. As they endure harrowing challenges in extreme heat, they are helped by a kind woman and a geology student, who are both caught in a strange plot. In the end, Nancy and her friends uncover a priceless treasure of gold, narrowly escaping danger.