People Who Return to the Ruins

Before his death, his grandfather left Lin Yichen a black stone and a sentence: "The gate of the world will open, and those who keep it will return." He thought it was just the old man's dying words, until the stone exploded into powder in the laboratory, leaving a door-shaped mark on his palm that would never fade away. In the vision, he saw a huge door standing in the void, and saw a young grandfather wearing ancient armor standing in front of the door and shouting in tears: "Four thousand years! Isn't four thousand years enough?" From that day on, he learned about the other side of the world - there was a door that separated the human world and the underworld, and four families had guarded it for four thousand years. Now the door is about to open, but the four veins have withered away: the Mo family has been wiped out, leaving only an orphan girl who has been missing for twenty years, the last descendant of the Shen family died in a mining accident six years ago, and the Pei family fled to the northwest without any news. As for the Lin family, he was the only one left who had just awakened. Within a year, he must find the descendants of the remaining three lines. And the thing on the other side of the door has smelled his breath.