This is the battlefield of myriad races, where countless races of the starry sky vie for supremacy! Nantianmen City, the human Dragon Kingdom, stands as a bridgehead on this battlefield, resisting the invasion of countless races from the starry sky. On this day, the allied forces of eight alien races attack, and Nantianmen City falls! The portal back to Earth is destroyed by a traitor, leaving 30,000 Dragon Kingdom soldiers isolated and helpless, all dying heroically! At this critical moment, Chu Yun Sheng, originally a university aid soldier, awakens the Nine Heavens Divine Thunder with only one sword, bravely shouldering the responsibility of defending his home and country! One man, one sword, guarding the lonely city! Single-handedly resisting a million-strong army of myriad races! "Valiant China, let us face this national crisis together!" "We will not cease fighting until our blood is spilled!" "In the East lies China, rising like the sun!" "A century of national humiliation, the sorrow of the past is hard to quell!" "The world is in turmoil, where can peace be found?" "Our nation has elite warriors, who can rival them?" "Kill! Kill! Kill!"