The story begins with a girl named Yang Yumo and her classmate Liu Yusha as they accidentally enter You Shanding and embark on an adventure.

Upon their arrival in You Shanding, Yumo and Yusha are attacked by chaos beasts and lose consciousness. Fortunately, Leo, a stone lion warrior responsible for defending against the chaos beasts in You Shanding, finds and saves them. However, Yumo unexpectedly gains the power of dragon vein energy, which alters her appearance. To regain her usual look, she accepts an offer from the chief, Leo's superior and manager of You Shanding. After that, Yumo spends her summer vacation working for him and fighting against the chaos beasts.

While eliminating the chaos beasts that were rampaging in Ximending, they encounter two other individuals from Kunlunian – Bahet and Le Viada. However, these two seem to have been brainwashed and are causing trouble in the mortal world and in You Shanding. As they follow clues and search for the culprit controlling Bahet and Le Viada, the perpetrator reveals themselves before Yumo and the others. To Yumo's great surprise, this villain is none other than a little girl named Nemea, who is also the Ximending Dragon Vein Energy that controls the AI.

After a series of battles, Yumo successfully prevents the system from spiraling out of control and frees Nemea from its grasp.

Then, it seems Yumo's adventure is coming to an end.