The town of Huanshan has been experiencing a series of bizarre incidents: resident Nicole fell to her death, U City student Chen Jiayu died unexpectedly while participating in a shooting activity in Huanshan, and internet-famous writer Qiao Gege fell unconscious from a tower at a tourist attraction. What is the common factor among these three individuals?

环山镇接连发生了离奇事件：居民妮可坠楼身亡、在环山镇参与拍摄活动的U城学生陈佳余意外丧命、网红作家乔格格在旅游景点坠塔昏迷。三人之间有什么共同点？
为了追查真相，颜有为与好友们相继前往斜塔察看。然而，紫慕睿却在刚踏进斜塔时，就昏倒了！
几经调查后，他们发现滋事的恶鬼竟来自斜塔的地下水库，同时还查出女守塔人不为人知的故事......