As planetary mutation swept across civilization, ravenous Devouring Abysses spanning hundreds of kilometers fractured the continents while an ancient evil god's corpse slowly materialized in the upper atmosphere. Daylight ceased its return, condemning the world to eternal darkness as the Apocalypse Radio broadcast humanity's final directive: "Flee eastward—chase the dawn." Lin Xian possessed the [Mechanical Heart]—a rare awakening granting him dominion over machinery itself. He could absorb mechanical constructs to unlock hidden abilities, reverse-engineer blueprints from captured devices, and command vast technological networks through sheer will alone. Seizing this power, Lin Xian commandeered a colossal 200-ton locomotive powered by ancient gas engines. Behind it stretched a specialized convoy: cultivation chambers, agricultural sectors, manufacturing facilities, medical bays, and living quarters—a moving fortress of human survival. Across 320,000 kilometers of planetary rail, he drove his Infinite Train eastward, racing toward the final sanctuary where dawn still lingered.