When Paul Revere is kidnapped by a time traveler determined to change the outcome of the American Revolution, thirteen-year-old Kep Westguard is sent to Boston, 1775, to take his famous midnight ride. Kep's four-person team has twenty-four hours to light the famous lanterns at Old North Church, warn Lexington and Concord that the British are coming, and rescue John Hancock and Samuel Adams from hanging as traitors to the crown.
As the clock ticks, one teammate is arrested as a runaway slave, a British watchman stops another from lighting the lanterns, and Kep nearly drowns when he attempts to cross the Charles River in a Patriot inventor's prototype wooden, hand-crank submarine. When Hancock and Adams ask Kep to sneak a trunk of critical papers out from under the eyes of the British Army during the Battle of Lexington, Kep has to decide how much he's willing to sacrifice for his country. If he fails, there will be no America to return to.