An apparently accidental injury sustained in the line of duty tears open an unknown abyss hidden beneath the glittering surface of the modern city.
On the third basement level of the Municipal Public Security Bureau is a secret department known to almost no one, even among its own staff. Its codename is the Seventh Squad. They don't handle ordinary murder cases. Instead, they confront extreme anomalies that defy the laws of physics and cannot be explained by science.
During an operation, detective Shen Yi suffers a severe head injury. His optic nerves mutate, awakening a special ability that lets him see the wavelengths of anomalous energy fields at crime scenes. When he joins the Seventh Squad with this new sight, he expects to investigate nothing more than a sealed-room mystery involving an excavated ancient mirror. Instead, he stumbles into a vast conspiracy thirty years in the making.
Thirteen bronze mirrors exuding hallucinogenic mist have formed a massive synchronized resonance array beneath the city. A chief expert who should have died in a laboratory fire thirty years ago has turned his own cervical vertebrae into the array's core. And a deadly mole hiding within the police department, willing to murder his own brothers in arms, is trying to turn the entire city into a gigantic energy field.
Faced with steel monsters powered by anomalous energy and threats from the unknown, Shen Yi and his comrades in the Seventh Squad have nowhere to retreat. They can only hold the line amid the crisis through rigorous detective work, overwhelming firepower, and teamwork. As the investigation deepens, Shen Yi gradually discovers that his eyes, which can see the energy at crime scenes, were originally planted as a pawn in that classified project all those years ago.
When a hunter discovers he is part of the game too, all he can do is face the danger head-on and fight his way out through this steel jungle teeming with anomalous energy.
