The story is set against the backdrop of ancient ruins on the Chinese border, and tells the story of the eventful life of young Li Chenglie who was chosen to become the guardian. In turbulent times, ruins have become the target of competition among various forces. Under the guidance of his master Shen Yunhe, Li Chenglie gradually understood the history and secrets behind the ruins, and met Anna, a scholar from overseas, and Feng Feiran, the daughter of a local warlord. In the process of protecting the relics, Lee Seung-yeol experienced the conflict between faith and reality, and the collision between personal destiny and the current of the times. He and his allies jointly resisted the invasion of the mysterious organization led by Obsidian. After several life and death tests, they finally revealed the true meaning of the ruins - protecting not only the stone sculptures and murals, but also the foundation of civilization and the spirit of the nation. As the battle escalates and the sacrifices intensify, Lee Seung-yeol grows into a true guardian through choices and pain. The story uses the style of historical biography to record the perseverance and dedication of a generation of soldiers, and also shows the glimmer and greatness of individuals in the long history.
