Canterbury, Connecticut, 1832: a charming female boarding school has found success among the locals, with two dozen girls enrolled. Some in town question the purpose of educating young girls—but surely there's no harm in trying? At least not until the Prudence Crandall School announces its plans to start accepting black students. Thirty years before the abolition of slavery in the United States, in the so-called "free" North, these students will be met by a wave of hostility that puts the future of the school in question, and their very lives in peril. Even in the land of the free, not all of America's children are welcome.