William Tuck is set on justice. For his brother killed by British soldiers, for his friend Rebecca's father held prisoner by the redcoats, and for the countless other rebel Americans struggling beneath the crushing weight of British rule.
The whispered words of a dying soldier, and a mysterious watch, give William all the ammunition he needs; a secret message for the leader of the rebel army. Rebecca disguises herself as a boy, and she and William join the American troops.
They embark on an epic journey that pulls them into a secret network of spies, pits them against dangerous gunmen, and leads them on a quest to find General George Washington himself. Can William and Rebecca determine friend from foe long enough to deliver a message that might just change the tide of the American Revolution?