A group of visitors possessing extraordinary skills from foreign lands arrives at the imperial court of the Great Yong Dynasty. They bring high-yield crop seeds, metallurgical techniques, and mechanical concepts, promising to make the nation wealthy and powerful in no time. Emperor Jing Ji Xuance understands that behind these extraordinary techniques lurks an external force beyond his control. Designs and technologies that benefit the people may be preserved and promoted, but when human will is manipulated by outside forces, even the greatest talents can become the root of chaos. From court officials to his own flesh and blood, no one is immune to the risk of corruption. Faced with the immense temptations of eternal life and reuniting with lost loved ones, he stands firm in his duty to his country and people, investigating the source of the foreign power. No matter how tempting shortcuts may be, the fate of Great Yong must remain in its own hands.