The remaining seal of the ancestral home has an eight-character inscription: Mountains and rivers will never die, and the fire will be passed down from generation to generation. Lu Changqing, a graduate student in the Department of History, discovered a broken bronze seal among his ancestors' relics, and has since been thrown into key historical nodes. He saw the same text as the Qin Emperor's letter, saw the Han army marching out of the fortress, saw the lights of the Tang Dynasty, and saw the beacon smoke of Anshi; saw the people of the Song Dynasty guarding their cultural heritage, and saw the blood on the cliffs and mountains; He is not going to be an emperor, nor is he going to take credit from heroes. All he can do is protect a scroll of bamboo slips, save a group of children, send a message, transfer a box of files, and bring back a name that should have disappeared to future generations. Big history cannot be changed lightly, but the fire of small people can be preserved. On the day when the Nine-Split Mountain River Seal was repaired, Lu Changqing finally understood: The one who truly protects the mountains and rivers is never a single traveler, but the thousands of people who burn themselves into fire in the darkness. And what he wants to do is to let them be remembered.