Yi Xiaocheng, assuming the identity of Little Jack, received an invitation from the royal princess to go on an adventure to the legendary underwater city with a group of S-class captains. In the Undersea City, Yi Xiaocheng led the team into the Greedy Cave of the Undersea City, witnessed the massive Round Table Trial, and met the mysterious Nine Elders who looked both human and inhuman, but found out that everything was a conspiracy. How should Yi Xiaocheng respond to the crisis?
