Strange cases occur one after another in Qingxi County. Shen Yan, a county yamen constable born with double pupils, uses his keen observation and meticulous reasoning to unravel a series of bizarre cases, including the haunting of the Gu Residence and the mystery surrounding a grave relocation. Behind superstition lies a hidden conspiracy, while beneath old cases lie buried injustices. Together with his partner Xiao Liu, he follows every clue to uncover the truth amid a battle of lies and human motives, ensuring that evil has nowhere to hide and that long-standing injustices are finally brought to light.