There is an echo storage hall hidden deep in the alley, which can store the obsessions that cannot be let go in this world.
The price is to pass the pain onto Su Yu, the successor.
Shen Shu keeps throwing away fragments of relics that have been gathering dust for many years, stirring up suspicion and setting up a trap that spans twenty years.
Su Yu bears the sorrow of countless strangers, and is entangled between lies and truth with the guardian Lu Yan. In the entanglement of love and hate, he tears apart the past that everyone has deliberately forgotten.