It's time for Eli and Shanbang to accompany their new friend Junjie back to the strange and beautiful Eastern cave. But when they arrived, they were shocked to discover a world that was darker and more dangerous than what Junjie remembered. The treacherous emperor's followers plundered the slugs in each cave, without the energy of the slugs, the eastern cave had become ruins. The stolen slug was locked in the center of the emperor's evil rule - the palace. Groups of enemies stand between the Shaun Gang and the Slug, from foolish Stone Warriors to the Emperor's underground army, and then to the most dangerous Daphne, a terrifying master of Slug and Slug Fur. But Junjie is determined to save the slug, save his own home, redeem his legacy as a dark sling under the control of the emperor, with Eli and these people by his side, he doesn't have to do this alone