The Cash Cache Mystery’s main characters are Dan and Paul Case, Edward Ridgway, and The Dalton Brothers. This book is about two brothers Dan and Paul who live in a small town named Farmingford. The brothers give a ride to a man named Ambrose Dexter and they drop him off to his destination, but they soon find out that his real name is Edward Ridgway and that he stole money and was hiding it somewhere. While the twins try to find the money and the true Ambrose Dexter, they are kidnapped by the Dalton brothers and then by Edward Ridgway himself.