Two modern-day kids discover the truth about an American Revolutionary War-era female spy through a treasure-hunt adventure in their hometown of Setauket New York. With codewords and secret signals perfected best friends Rachel and Joon are ready to spend their summer practicing spycraft--especially if they can uncover secrets like the one Joons parents have been keeping that his family is about to move out of town. When eavesdropping leads them to a ring rumored to have belonged to Anna Nancy Smith Strong--according to local Long Island legend the only female member of George Washingtons famed Culper Spy Ring--they think theyve hit the jackpot. Then they discover Nancy left a coded message in the ring! Decoding her message leads to another cryptic clue and then another and soon Rachel and Joon are racing to decipher a series of puzzles that must surely lead to hidden treasure! But can they solve the final mystery before Joons moving day? And just what did the centuries-old spy hide away--and why? Sarah Beth Dursts skillful blend of Revolutionary War history and suspenseful contemporary storytelling will keep readers guessing to the last satisfying page.