When Su Tang, the administrator of the anecdote archive, was sorting through old files, he discovered a photo of the scene taken ten years ago, which was exactly the same as the anecdote he investigated yesterday. The photo points to the dusty top secret file "No. 76" - This is the biggest lie of the investigation organization "dusty", and also involves the mysterious disappearance of my sister three years ago. In order to find the truth, she sneaked into an abandoned lighthouse alone, but unexpectedly ran into Shen Mo, the "ghost" who had been expelled from the organization. It turns out that all the obstructions and warnings in the past three years were the last protection left to her by her sister. When the mist cleared and the secrets of Project 76 surfaced, Su Tang understood: behind the strange rumors in the city, it was never ghosts, but the human heart that was harder to crack than lies.