At night...
Luan City's hidden graveyard.
The Ancestral Mound of the Lu Clan.
A secret land protected by arrays was used by the Lu Family as their Ancestral Mound. This is a place where they bury the descendants of their clan including their weapons.
The two Lu brothers had spent too much time at the marketplace and could only check the family's cemetery at this late time. The Ancestral Mound of the Lu Family was protected by an illusion array that not only protects the land but also prevents those who aren't cultivators from entering the secret land. This is to avoid ordinary humans from entering this place, especially the tomb raiders who like to steal from the graves.
But recently, there are reports coming all over the town that a lot of ordinary people had gone missing, especially women and teenagers. There are witnesses, of course, they all said they had disappeared in the direction where the Lu Clan's Ancestral Cemetery was located.