An unearthed bronze mirror transports Lu Chuan into the war-torn ancient times.
He has no system, no immortal sect inheritance, only a group of refugees who may betray at any time, and a costly ability: touching an ancient object, you can see the afterimage of its past.
In order to survive, he set up a caravan, collected refugees, and trained guards to establish his own power in troubled times; in order to return home, he excavated ancient tombs, deciphered inscriptions, and traced taboos that had been erased from history books.
But as human monuments were rediscovered one after another, Lu Chuan discovered:
Myths are not legends, and ancient times are not the real past.
Throughout the dynasties, "visitors from outer space" have arrived; and those who tried to return to their hometown have disappeared from history without exception.
Until he saw his name on the stone wall thousands of years ago.
And a warning left to him:
"Don't open that door. What's waiting for you behind the door is not an immortal."