Thick fog, wrapped in the rusty smell of brass gears, spread over every street and alley in the steampunk foggy city - the mechanical nightingale held the bloody clockwork in its mouth and plunged it into the chest of the female textile worker, waking up Lin Xia who was unconscious at the entrance of the alley.
She is a mechanic with a brass prosthesis on her left hand. When she wakes up, she forgets all about the incident. She only knows that there is a "faulty system" hidden in her brain: every time a clue to the murder is unlocked, a piece of memory is randomly deleted, and even the mechanical manual left by her father becomes a blank page. It wasn't until the blond detective Kane handed over a gear staff and the symbol on the inside of the pocket watch matched her necklace that she was shocked to realize that this murder was tied to the family's extermination ten years ago.
One is good at mechanical dismantling, and the other is good at logical reasoning. The two strong partners chase the blood of the mechanical nightingale, from the gear decoration in the noble tavern to the secret experiments of the Royal Academy of Sciences. System pop-ups always cause trouble at critical moments, but they also expose Kane's disguise as a "royal agent" and Lin Xia's life experience as a "descendant of the Mechanical God" - the Gear Cult wants to capture her as a sacrifice to resurrect the Mechanical God who can devour life.
The steam airship in the foggy city was hovering overhead, and the footsteps of the mechanical puppet were getting closer and closer. Kane clutched her mechanical prosthetic limb: "Even if you forget everything, I will help you find the truth." The deepest secret of the system is hidden in the overlapping shadows of the two people, together with the vague gear symbol, waiting for the moment to be twisted.
