The world of immortality is hidden in modern cities, and ancient demons lurk in the world. Ordinary people know nothing about it. Only the "keepers" who inherit the ancient bloodline can communicate with heaven and earth in a special way and resist the invasion of demons.
Lu Chengyuan, a graduate student in the Department of History, has been obsessed with ancient books since he was a child. However, due to his weak constitution, he cannot even do the most basic "introduction of Qi into the body". He is regarded by his family as a "bloodline waste" and is not even qualified to touch the ancestral "Secret Code of Defending the World".
