A sixteen-year-old girl is sent to a boarding school while her father takes care of her sick uncle, Horace, living in California.The directors of the Moravian Seminary and College for Girls are summoned to New York, leaving the girls in the charge of Miss Crawford, the school matron. During their trip, Gay, Helga, Marjorie and her brother Tom explore the school facilities that were also used as a hospital during the Revolutionary War. During the Battle of Brandywine, a soldier was entrusted to give General Greene personally a letter from General George Washington . After the soldier was wounded and died, nobody knew anything about the letter until the girls accidentally discover it, joining efforts to solve the mystery about the "lost letter".
A sixteen-year-old girl is sent to a boarding school while her father takes care of her sick uncle, Horace, living in California.The directors of the Moravian Seminary and College for Girls are summoned to New York, leaving the girls in the charge of Miss Crawford, the school matron. During their trip, Gay, Helga, Marjorie and her brother Tom explore the school facilities that were also used as a hospital during the Revolutionary War. During the Battle of Brandywine, a soldier was entrusted to give General Greene personally a letter from General George Washington . After the soldier was wounded and died, nobody knew anything about the letter until the girls accidentally discover it, joining efforts to solve the mystery about the "lost letter".