Two years ago, when eleven-year-old Garrett Turner moved to Wethersfield, Connecticut, he thought the most exciting thing about his new life was having a real backyard. Now, Garrett and his best friend, Kylie, are thrown into a mysterious treasure hunt for an extremely valuable document hidden by George Washington over 200 years ago. As they begin to unravel the clues and solve the codes that Washington used to hide the document, they learn that they are not the only ones searching for it. Trouble is close behind – will Garrett and Kylie find the document before danger finds them?