Ariel Hartman, the seventh-grade super sleuth, is drawn into a mystery that dates back nearly 250 years. A rare diary written by a soldier of the American Revolution is stolen from the Summerville Museum, and Ariel's classmate may have witnessed the crime. The diary contains a page autographed by George Washington that is believed to be the motive for the theft. Ariel must learn the origin of the diary to understand its true worth. More than a children's 'whodunit', the major points of Galatians are woven into the plot. At the end, the reader plays detective in search of the similarities between the story and the epistle.