Blackstone City, an iron jungle where crime thrives in the shadows of skyscrapers. Here, conglomerates monopolize the economy, politicians and gangsters collude, police badges are little more than decorations, and the night is a breeding ground for crime.
Twenty years ago, young Lin Mo watched his parents die in a hail of bullets amid a power struggle as they tried to stop a conspiracy. The authorities hastily closed the case as an “accident.” In a single night, the pride of the city became an orphan burdened with a blood feud and was sent overseas.
Twenty years later, Lin Mo returns as the “sole heir to the Blackstone Group.” By day, he is a playboy who mingles with the rich and powerful, using his hedonistic lifestyle to conceal the coldness in his eyes. By night, he becomes the “Night Watchman,” clad in a high-tech suit and prowling the city's darkest corners. He has no superpowers. Instead, he uses his vast fortune to build cutting-edge equipment and ten years of training to master elite combat and investigative skills. With an ordinary human body, he declares war on the entire corrupt power network.
His arrival is like a blade piercing the darkness, striking fear into street thugs and shaking the oligarchs pulling the strings. But as his investigation deepens, he discovers that his parents' deaths were only the tip of the iceberg. An ancient conspiracy capable of overturning the entire city is quietly stirring back to life. A crime boss, a mad scientist, mutated cyborgs, and even a “ghost” hidden within the police force all become deadly enemies in his path.
On this lonely road of vengeance and protection, he is not entirely alone. His loyal butler has his back, a righteous policewoman acts as his inside contact, and a mysterious technological genius upgrades his equipment. But with trust and betrayal entwined, and truth tangled with lies, Lin Mo must find a way to strike a balance!