In the Spirit Cat Secret Realm shrouded by a sea of cherry blossom forests and isolated from the world, Xiao Hei, a youth burdened with a special bloodline, and Huan Huan, a kind and nimble maiden, depend on each other and live in peace. However, dark shadow demons and other forces lurking in the dark are awakening, and a dark disaster is stepping by step approaching this peaceful pure land. To protect his home and the people around him, Xiao Hei holds the Lanxi Sword and embarks on a path of resistance, officially raising the curtain on the secret realm catastrophe, and an adventure concerning the survival of the entire secret realm is about to begin.