In Dongzhou in the thirties and forties of the last century, there was a mysterious young man with a suave and wealthy family, who was not only the famous detective Lang Xiaobai of the Starlight Detective Agency, but also repeatedly solved major cases; He is also a thief and a thief, and he has repeatedly committed headache-inducing "big and important cases". He robbed the rich and helped the poor, jealous and hateful, chic and affectionate, gentle and elegant; He was brilliant and thoughtful, and no wicked person could escape his piercing eyes. In the same way, he also ...... himself His generosity and handsomeness have won the love of countless innocent girls.