This is not a traditional “war god returns” or “medical genius son-in-law” story. Its core distinction is that the “profound skill” Zhang Jie has learned is not purely martial arts or medicine, but a nearly philosophical “meta-skill” that lets him see the underlying principles governing everything, including human nature, society, and the natural world. He is powerful, but that power seems completely out of place amid the complicated rules and social conventions of modern city life, and at first it even lands him in deeper trouble. His journey to repay a debt of gratitude and his life as a live-in son-in-law become a long, painful, and profound exercise in applying this “meta-skill” to the real world.