Set in a small Maine coastal settlement during the American Revolution, the story follows two girls, Rebecca and Anna Weston, who become involved in efforts to secure powder and aid for their struggling village. Scenes depict daily life at the lumberyard and harbor, family interactions, community meetings, and growing tensions as local men prepare resistance; the girls undertake a dangerous overland journey through forest to carry vital supplies, displaying courage and patriotism. Episodes are interwoven with historical incidents such as a local naval engagement and the presence of community leaders, and the narrative emphasizes resourcefulness, loyalty, and the contributions of ordinary people to the larger struggle.