Zhou Xuan is reborn as a demon-appraising officer in the Heavenly Master's Mansion of the Great Xia Immortal Dynasty. He starts with the Six Paths Treasure Mirror, which allows him to settle the lingering karmic debts of deceased monsters and demons, constantly gaining various rewards. He obtains powerful cultivation techniques and treasures such as the "Purple Qi Comes from the East" body refinement technique, the Taiyi Scripture, the Yuan Tu and A Bi swords, the Nirvana Dao Fruit, and a thousand-year-old peach. During a time of turmoil in the Three Realms, monsters and demons wreak havoc on the human world. Zhou Xuan, using his position, travels the world, secretly cultivating while appraising demons behind the Heavenly Master. He uses the Six Paths Treasure Mirror to rapidly increase his strength. One day, he turns around and suddenly realizes: "Within the Six Paths, I am invincible."