In the Forbidden City, which has a long history and profound cultural heritage, there live many cute cats. From the perspective of humans, they live an enviable and leisurely life. Among them, six royal cats are special. They are responsible for protecting the memory of cultural relics of "Wuhua." They entered the world of Wuhua and defeated the destroyer Black Owl time and time again, bringing the world of Wuhua back on the right track and thus protecting the cultural relics. The six imperial cats are Luban and Momo from the literary class, and Shuangmei, Aobai, Pingan and Xiaozai from the martial class. Not only are they intelligent and brave, they also have a tacit understanding. They form the Forbidden City Imperial Cat Room, which protects the national treasures of the world.

Third season of . The gods of the world—from Greek to Norse to Hindu mythology—gather every one thousand years to make one important decision: whether or not to wipe out mankind. Repulsed by humanity's selfishness, the council unanimously votes to destroy all humans. But before the decree is enacted, Brunhilde, one of the 13 Valkyries of Valhalla, interrupts the meeting to give mankind a chance at survival. Brunhilde proposes the idea of enacting Ragnarök, an event in which the strongest 13 mortal warriors fight against 13 gods in one-on-one matches. Although the trial is ridiculed by the gods, the demigod takes advantage of their pride and forces them into an agreement. However, Brunhilde herself must recruit the mightiest heroes throughout humanity's thousand-year history and guide them to victory before they meet their untimely demise.

In a ritual, the Goddess bestows upon 10-year-old children a "class" that shapes their entire future. As the son of the legendary Sword Princess Fara and Archmage Leon—two of the highest-ranked individuals in their respective classes—Arel seemed destined for greatness. Unfortunately, he is branded as classless and thus unable to naturally inherit any kind of specific skill. However, Arel soon discovers that he can replicate the abilities of any class he desires—though doing so demands significantly more effort than it does for the naturally gifted. Eager to test his unprecedented skills even more by finding stronger opponents, Arel sets out to defy the limits imposed upon him and prove that perseverance can surpass even divinely appointed talent.

Ye Chen, the outcast disciple, is banished from the sect and becomes homeless. Through a series of coincidences, he receives a True Flame and once again steps on the path of cultivation. This is a world where demons and deities co-exist and an era where all realms in the world are overrun by chaos. Ye Chen's journey to defying heaven begins, and after going through all kinds of trials and tribulations, he finally reaches the pinnacle of cultivation.