Lin Yu, a boy from the History Department, is obsessed with the history of the Qin Dynasty. When he was studying ancient books in the library, a mysterious light drew him into the battlefield of the Qin Dynasty. When he was confused, he rescued Ying Zheng who was besieged by enemy troops, and the two formed a deep friendship. Lin Yu relied on modern knowledge to introduce potatoes, corn and other high-yielding crops to Daqin to provide food and clothing for the people; he also helped develop muskets and cannons to enhance military strength. After that, he led the Qin army to conquer the north and south, and began a journey to conquer the world. During this period, he and Ying Zheng bickered and played tricks every day, writing a legendary chapter of blood and joy in this ancient dynasty.
