In Xinhai, a cyber city where neon lights and rain intersect, forensic doctor Ling Shuang's childhood nightmare reappears on a rainy night: the deceased passed away peacefully, but a strange colloid was hidden deep in the ear canal. This clue leads her to the Rainy Night of Showa Ballad where her mother disappeared. When the suspense novelist was perfectly murdered in a scene from his unpublished novel, and the same ballad was played at the scene, Ling Shuang realized that a hunter codenamed "Echo" was using twisted neurotechnology to weave a "script" and hunt silently in the rain. She must go deep into the shadows of the hive area and the cold core of the technology giants, dissect layers of lies, and pursue the truth in the data abyss and the deadly "Requiem" - not only for the dead in front of her, but also for her mother buried deep in the rainy night, and to prevent an ultimate resonance that will drag the whole city into the abyss of "silence."
