For unknown reasons, the paths of reincarnation in various times and spaces became connected to the Underworld. The Underworld's workload increased until its magical artifact, the Mirror of Karma, could no longer bear it and was damaged. The judgment of the dead became inaccurate, so the Four Great Judges of the Underworld had no choice but to send out their four assistants. They must travel to various times and spaces and retrace the lives of the little ghosts before they can judge good and evil and complete their trials.
The lingering souls that keep appearing all seem unusual. They disrupt the order of the Underworld and throw reincarnation in every realm into chaos. Who is behind it all?
