In the 25-year-old modern city, there is an undercurrent surging under the prosperity. Wu Xiaofan, an orthodox disciple of Maoshan, went down the mountain with the Seven-Star Longquan Sword. When investigating the serial disappearances, he met Lin Xiaoyu, a private cultivator who held the ancestral Yin-Yang Mirror. The two discover that behind the incident lies the "Demon Slayer King" who attempts to break the balance of the three realms - he uses the human world as his hunting ground, controls resentful souls, raises zombies, and wants to use the "Heart of Chaos" to tear the boundaries between heaven and earth and establish a new world ruled by ghosts.
From the haunted abandoned hospital to the mysterious Kunlun Mountain Hotel, from the frightening steps in the world to the dangers in the heaven and the underworld, Wu Xiaofan's integrity and Lin Xiaoyu's agility collided to create wonderful sparks. The resonance between the Seven-Star Longquan Sword and the Yin-Yang Mirror not only reveals ancient secrets, but also closely connects the fate of the two. When the passage to the Three Realms is on the verge of collapse, and when sacrifice becomes the only option, can they shoulder the burden of guarding the Three Realms as mortals?
An adventure that combines Taoism and technology, and interweaves friendship and love, begins in the gap between Yin and Yang.
