Huang Sheng was knocked out and locked into an iron cage. The captor asked Huang to explain the "Missing Sarira Case" that grabs the whole country's attention. A year ago, Huang was an unknown security captain. He was called "Detective" when he cracked the "Missing Sarira Case". As Huang Sheng continues his story, more and more truths come out. The film shows the ancient Chinese shadow puppetry and the Aria-Lao Qiang. Aria-Lao Qiang is the earliest rock music in China. The history of Aria-Lao Qiang could trace back to 2000 years ago. The film combines an extraordinary theft case with the Aria-Lao Qiang, and the film shows the traditional Chinese culture.