Lin Yan is an orphan struggling to survive in the real world. After accidentally binding himself to a quick transmigration System, he begins traveling through parallel worlds created by films and novels. He never starts out as a dazzling protagonist, but as a cannon-fodder character overlooked by the plot, or a minor supporting character on the margins. He might be an apprentice going hungry in a war-torn era, a student ignored in a technologically backward world, or a low-ranking official liable to lose his life at any moment amid a dynastic upheaval. But at his core, the orphan refuses to accept his lot. He seizes the “gaps in knowledge” in every world: reclaiming barren land and growing crops, promoting agricultural science, studying mathematics and science to lay the foundations for industry in backward eras, and proposing new policies to protect the people in troubled dynasties. He has no superpowers or other golden finger, only years of diligent study and practical effort. Lin Yan uses knowledge to change his own fate, and driven by his determination to make his country strong, he plants the seeds of prosperity in every parallel world. He may never become the “protagonist” of any world, but he will ultimately become the “founding builder” no world should ever forget.