A band of patriotic youths in the tense months before the Revolution form a club, practice military drills, and pursue a series of clandestine adventures around Concord and Boston. Two friends, Phil Warrington and Andy Sabine, track a mysterious lad, stumble into spying, captures, escapes, and riverborne voyages, and become involved in the midnight ride, the clashes at Lexington and Concord, and the siege at Bunker Hill. The book unfolds as episodic chapters of daring exploits, camp life, and small-scale reconnaissance that emphasize loyalty, resourcefulness, and the transition from boyhood play to serious civic commitment.