A skeleton was unearthed at a demolition site in the old city. A special "bronze pattern" mark remained on the skeleton. The police initially determined that it was a disappearance case 10 years ago. However, after Lu Chen was commissioned by the skeleton's family to intervene, they found that the identity of the skeleton did not match the missing person, and the "bronze pattern" pointed to the mysterious organization "Xuanying Society" in Jingcheng many years ago.
