While Wu Xie is out with a fever, his friends go to an expert to find more about their findings from the tomb. A mysterious Mr. Jiao is revealed to be obsessed with finding the secrets behind listening to thunder. Wu Er Bai and Wu Xie strike a deal to explore the South Sea King's tomb together, with Er Bai being set on keeping his nephew out of trouble and danger-free. To help them find the entrance, Er Bai calls on the help of Liu Sang, who has exceptional hearing.