The Yellow Face by Arthur Conan Doyle

A husband grows suspicious when his wife secretly visits a cottage and refuses to explain her behavior. Holmes initially suspects blackmail or an affair, but the truth reveals a hidden child from a previous marriage—whose mixed-race identity the wife feared would cause scandal. The plot is emotionally rich and ends with an unexpected lesson in humility. Holmes acknowledges his incorrect deduction. It’s a compassionate story about love, trust, and overcoming prejudice.