There is an imbalance of yin and yang in the land of Kyushu, and strange phenomena occur frequently - a deep black gap opens where the yin energy gathers, and the world calls it the "Ghost Gate". The gate of ghosts connects yin and yang, causing the dead to turn into strange "underworld guests" and wander the world.
In order to solve the prophecy of "the gate of hell appears and the world is in chaos", stargazer Gan Mu joins hands with Gu Huai, the holder of the Zhenyin Order, to embark on a journey. However, as the truth emerges, they gradually realize that behind this catastrophe, there is a shocking conspiracy that spans thousands of years.
