Jeremy, Henry, and Isak are sent to New York to assist Patriot spy Nathan Hale. When Hale is betrayed by his cousin and arrested, they try to devise a plan to save him.

Disgusted with the pace of the war and the lack of enthusiasm by some of the Chester residents, Henry's cousin Edward turns to terrorist activities. When Henry is arrested in his place and sentenced to hang, Jeremy, Isak, and Lafayette organize a rescue.

The Yankee Doodle society takes in three newcomers, unaware that one of them is a spy planted among them by the British in an effort to learn the identity of the rebel leader. After a mission goes awry, it becomes obvious that one of their recruits has tipped off the enemy of their plans. Unfortunately, they don't have time to route out the infiltrator before the next mission.