Song Jingming, the most dandy young man in the capital, spends his days fighting chickens and running dogs, bullying men and dominating women. He is a waste in the eyes of everyone. No one knows that he hides a "mecha heart" from the future - a golden finger that can analyze, transform and create all mechanical devices.
When the shadow of the Tumubao Incident loomed again, when the Mongolian cavalry came to the city carrying mysterious "iron-armored beasts", when the treacherous officials in the court colluded with foreign enemies to subvert the country, Song Jingming was forced to be involved in a shocking conspiracy. From an abandoned son who was abandoned by his family, he began to use the heart of the mecha to transform firearms, create battle armor, and improve city defenses, gradually uncovering the hidden truth of the world.
It turns out that this era is not real history, but a parallel world intervened by some kind of advanced civilization. Those so-called "Shenji Camp", "Fire Dragon Out of Water", and "Swarm of Bees" are just superficial imitations of ancient mecha technology. The real mecha civilization once flourished and perished in this world, leaving countless legacies.
What Song Jingming has to do is not only to survive this power game, but also to find a way home. But before that, he must first become the strongest person in the world - use mecha to change history and change fate against the will of heaven!
