Joined by allies including Wang Pangzi, Zhang Qiling, Hei Yanjing, and Liu Sang, Wu Xie begins to piece together clues suggesting that a place called Thunder City holds the key to his uncle’s fate, as well as the secret behind the listening thunder ritual.

Their journey takes them deeper underground through winding corridors, toxic mist-filled forests, and into the legendary Thunder City. There, a hidden mechanism and a mysterious bronze lotus device appear to control sound and possibly even life itself. As the group’s loyalty, courage, and technical skills are tested, tensions rise and betrayals surface, including one from within their own ranks. At the same time, a shadowy conspiracy tied to the warehouse’s past threatens to unleash disaster.

With time running out and Wu Xie’s health steadily worsening, the group races to decode ancient recordings and activate the listening apparatus before toxic gas and unseen enemies close in. Their path leads them ever closer to the heart of the mystery and to a revelation that will change everything.