What if the most important message was one no one could see?

During the American Revolution, George Washington needed secret information to help win the war.

Brave men and women formed the Culper Spy Ring, hiding messages in invisible ink, coded letters, and ordinary-looking notes.

If the British found one of the letters, it looked completely harmless.

But the hidden words could change everything.

Step into this fascinating true story and discover how ordinary people became secret spies. Could you have kept one of their messages safe?