Shen Qingci, in order to investigate the mysterious death of his grandfather, entered the ancient Shen family house that had been deserted for ten years. But in the study room full of institutions, he unexpectedly encounters Gu Yunzhou, who calls himself the "lost scholar" - there is a gloominess in his eyes that is inconsistent with his innocent appearance, and his smile is somewhat humorous. Strange things happen frequently in the old house: moving portraits, cries in the middle of the night, and missing secret messages. Each mystery points to the "secret transaction" of the grandfather during his lifetime. I wanted to decipher the truth alone, but I found that Gu Yunzhou always appeared at critical moments. He had too many "coincidences", like a hunter hiding in the dark. When betrayal and deception surfaced, I was shocked to realize that this encounter was never an accident. We were all risking everything for different secrets.