This seemingly peaceful world is not just inhabited by humans. All along, the little demons and fairies in the world have been living among us in human form. Among them, there are those who are kind-hearted towards humans and those who are wicked. The secret organization that maintains order and peace in this world is the hidden martial arts clan known as the Hidden Mist Sect. The evil demon Tian Xie attempts to use the power of Tai Sui to eradicate the Hidden Mist Sect and build a demonic kingdom, but unexpectedly, Tai Sui becomes attached to Wu Yin.

The world is on the brink of catastrophe in a chaotic age where evil demons roam. In order to keep evil at bay, a mysterious organisation from the pugilist world emerges. A new constable and a young girl with a mysterious past are also drawn into this group, and the group embarks on an incredible adventure.