Within the Great Liang Dynasty's steam-powered civilization, powered by the precious fuel Violetstream Gold, lives Chang Geng—a village boy estranged from his mother, with a perpetually absent stepfather. His closest bonds are forged with two young companions, a village teacher, and his devoted adoptive father, yi fu. His sheltered existence shatters when the barbaric Man tribes' invasion breaches his world, revealing a catastrophic truth: Chang Geng's identity was entirely fabricated. His mother harbors a hidden past, his teacher conceals her true nature, and his beloved yi fu emerges as someone entirely different—nothing in his world was ever genuine.