Since ancient times, the universe has been divided into three realms: the Human Realm, the Immortal Realm, and the Demon Realm. But few know of two others: the Dao Realm and the Dark Domain. If the Immortal Realm exists to keep the Human and Demon Realms in check, then the Dao Realm can be called the keeper of order among the three realms. As creatures of the Dark Domain grow increasingly restless and a great calamity draws near, Li Siqi, who belongs to the Dao Realm, has been sealed beneath Quan Mountain for over a thousand years. Unable to control the yin and yang energy within him since childhood, he had killed many people across the three realms. But the arrival of Yan Wule from the Demon Sect shatters this peace...
