Everyone says that at the end of hell is the eighteenth level of purgatory, where evil ghosts who have sinned so much that they cannot be reincarnated are imprisoned. However, everyone knows that at the end of the eighteenth level of purgatory, there is still heaven and earth...
Legend has it that at the end of the eighteenth level of purgatory is a door, a door embedded with countless evil ghosts and fallen immortal spirits. It is a prison of evil spirits that even the Ten Palaces of Yama dare not easily enter. It is the seventh realm where the six realms join forces to imprison fallen immortals and ghost immortals who are born against the way of heaven - Netherworld Prison.
Legend has it that there is a sect in the world that guards the Netherworld Prison, but no one has ever seen it. Gradually, this legend was forgotten by the world...
But one day, that legend became an established fact...
