The old Dragon King gave Roarding Sky Dog, the defender of heaven a dragon ball for saving the king's third prince. The defend dog that transformed into a human was kind-hearted by nature but fell into the trap of a cat demon and escaped from his duty. The Jade Emperor was furious, he banished Roaring Sky Dog to the mortal world and asked him to make up for his mistakes. After coming down to earth, Roaring Sky Dog bravely breaks into the Pavilion of Ecstasy to capture the cat demon.