Lu Ci, a graduate student in modern criminal investigation psychology, traveled to a world where steam and mystery intertwined, and became the orphan "Alan Gray" from the East Side slum of Backlund.
He was born with the talent of "retrospection" - he can see fragments of remaining emotions from the past three days by touching objects. This allows him to trace the murderer from a broken hair and spy on the conspiracy from a broken mirror. But the price is: every time he looks back, those fears, despair, and crazy emotions may flow back into his consciousness and drag him into the abyss.
What's even more dangerous is that there is an "uninvited guest" living in his mind - the fragment of the will of the high-sequence extraordinary person Karl. The existence of this self-proclaimed mentor taught him spiritual vision and divination, but secretly led him to the throne of Origin Castle.
Dock workers disappeared one after another, the Secret Order created alien species in the dark, and the silver-faced emissaries of the Echo organization were closing in step by step... When Lu Ci joined the Nighthawks under the codename "Retrospector" and fought alongside his partner Vera, he found that all the clues pointed to the same answer——
The sequence system of this world is itself a hunting net.
And he is both the prey and possibly the only one who can break the chess game.
"In the world of extraordinary people, everyone wears a mask. The only difference is - some people live wearing masks, and some people die wearing masks."
