Struggling architect Leo Merriwether inherits his aunt's crumbling colonial, expecting a fortune. Instead, he finds a two-hundred-year-old journal revealing his ancestor hid a treasure of French gold meant for George Washington. Teaming with Margaret, a sharp-witted local historian with a photographic memory, Leo deciphers cryptic clues, navigates legal threats from a wealthy landowner, and crawls through a cave to discover a secret that rewrites history—and his own future.