In Lesson in Love, we are introduced to Kitty Byron, a 23-year-old woman with a captivating charm, who works in a military establishment in London. Her life takes a sharp turn when she meets Reginald Baker, a man who presents himself as sophisticated and important. Initially, their interaction revolves around a hat he claims is for his wife, but it quickly becomes clear that Reginald has ulterior motives. He is not just a gentleman; he is a scoundrel with a carefully crafted plan to seduce Kitty.