In a convenience store on a rainy night, Yuxuan awakens his metal powers and escapes the corpse tide in Ningcheng with the healing Su Li - fighting steel worms, building a gear fortress, overcoming dead ends such as the Puppet Master in Rust City and the water purification crisis. He also discovers the relationship between his parents and the Qinling underground space station, unlocks the evolution of his powers, and faces Starkiller's weapon choices.
Then the twelve giant towers emerged, the mechanical flying dragons attacked, the star gate opened, and the story entered the star sea: ascending to the Dawn Star to resist energy-absorbing crystal beasts, uniting with the original mechanical tribe, building interstellar battleships to fend off predators; sneaking into the interstellar federation to uncover the "mechanical ascension" conspiracy, and exploring the ruins of ancient metal civilizations to obtain the power of the origin of cosmic-level metals.
The gold-devouring clan invaded across the galaxy. Yuxuan led the coalition to fight to the edge of the black hole. Su Li used the antimatter core to destroy the enemy's nest, but Yuxuan was seriously injured and went into sleep. After waking up, he faced the ultimate crisis of "Cosmic Corrosion". He and Su Li fused their dual cores to form a "Cosmic Metal Symbiosis", united all civilizations to build an origin array to stop corrosion, and established a new order. His daughter Yuyue (with the power of metal prophecy) also grew up to be a guardian.
In the end, an "extraterritorial rift" appeared at the edge of the universe, and the couple left behind the "Legacy of the Dawn" and went into danger together, swearing that "the dawn will never end", leaving a shocking suspense.
