The clock struck midnight, and whispers that did not belong to the human world wandered through the streets of the foggy city. Su Ci, a detective with a mysterious life experience, is known as the "Eye of the Shadow Realm". He can see shadows that ordinary people cannot see, but he is always trapped by a past that he cannot recall. A bizarre case of mass disappearance has revealed a secret that has been sealed for hundreds of years; the souls of the deceased linger, reality and illusion are intertwined, and the truth is like a will-o'-the-wisp in the depths of the fog, flickering in and out. In the process of pursuing the truth, Su Ci discovered that behind the case was the cobweb of his own fate. The real culprit may not be human, and he himself was gradually being eroded by some invisible force. With each layer of mystery he unravels, he gets closer to the truth, but further away from humanity. Should you choose to protect the human world or join the underworld? The balance of fate trembles slightly between darkness and light.
