The narrative follows Elnora Comstock, a resourceful young woman who harvests moths in the Limberlost to finance her schooling while living under a stern, embittered mother. She confronts poverty, social embarrassment, and family estrangement, finds companionship and growing love, and pursues education and artistic study amid the swamp's natural riches. Encounters with neighbors and suitors test loyalties and prompt forgiveness, and her scientific collecting and connection to the landscape catalyze personal growth, reconciliation, and a hard-won independence rooted in moral strength and appreciation of nature.