Thirty-six thousand years into the Tianyuan era, the world of cultivation has entered its heyday. The forces of various major sects are intertwined, and the worlds of immortals and demons maintain a delicate balance. The core of the story takes place in the Ziwei Imperial Palace in the sky. This fairy palace suspended in the sea of stars is composed of seven celestial palaces. The highest Xuanji Palace is shrouded in the lunar starlight all year round.
The world of cultivation is highly hierarchical. Empress Feng Linyan is in charge of the Seven Killing Formations of the Big Dipper to control the Northern Territory. Her original "Xuanhuang Nirvana Sutra" needs to go through nine heart-burning tribulations before it can be completed. The most critical heart-burning tribulation is actually related to the relationship between master and apprentice.