Littlehampton, 1920. When Edith Swan begins receiving anonymous letters full of insults, Rose Gooding, her free-spirited and flowery-speaking Irish neighbor, is quickly accused of the crimes. The entire small town, concerned by this affair, gets involved. Police officer Gladys Moss, quickly followed by the women of the town, then leads her own investigation: they suspect that something is wrong and that Rose might not be the real culprit, a victim of the abusive morals of her time…