In July 1995, heavy rains closed the mountain in Xiaoniu Village in Taihang Mountain. Flash floods destroyed the Liu family's ancestral graves, and a large blue and white bowl from the official kiln was unearthed in the mud.
This bowl is the exclusive key to the Liu family's underground palace. Liu Dehai, the village party secretary who holds the secret of the underground palace, plans a seamless serial killing scheme in order to monopolize the underground gold and silver antiques.
First, he quietly murdered Han Laoxi, who had picked up the green bowl, and then set fire to his own house, using the corpse of a homeless beggar to fake his own death in the fire.
He and his three sons dug into the underground palace overnight and completely disappeared.
At that time, the evidence was incomplete and criminal investigation technology was backward. Young detective Lin Tian's doubts were not accepted, and the case was hastily filed, which became an obsession that has weighed on his mind for thirty years.
Time flies to 2025, and this unique blue and white bowl leaks out of the antique black market. Lin Tian seizes the only clue to restart the investigation.
Traveling between abandoned mountain villages and prosperous cities, while visiting the remaining villagers who knew about it, they restored the hidden grudges and grudges in the countryside in the 1990s.
While digging deep into the local leading Golden Knife Group, they opened up the thirty-year journey of the Liu family and his son to clear their name.
The old and new criminal investigation teams work together in division of labor, and the identification of physical evidence, interrogation games, and cross-provincial arrests are carried out simultaneously, dismantling the double-layered perfect criminal scam layer by layer, and unlocking the secret history of corruption buried in the underground palace for hundreds of years.
The confrontation between good and evil spanning thirty years, the fateful pursuit of the murderer by two generations of criminal policemen, revealed the endless bloody sins bred by greed under the mountains of loess and the tall buildings of wealthy families.
