How George Washington's spies saved America. In 1780 France entered the American Revolution. A French fleet was bringing crucial aid to the patriots. Did the British know? Would they intercept? George Washington needed answers - fast. To get them, he turned to his most trusted spies. Upon Secrecy follows the members of the Culper Spy Ring on their most daring and important mission. Washington couldn't outfight the British. Could he outspy them?