Wang Xiaohu works as a delivery boy in Jiangcheng. He rides an electric bicycle through the streets and alleys every day, just to collect medical expenses for his seriously ill sister. His clothes are simple and his speech is dull. Even the gangsters in the neighborhood dare to make things difficult for him. No one knows that this seemingly mediocre young man was once the only descendant of the hidden ancient martial arts family and the legendary ace of the "Dark Night Blade" special forces ten years ago.
