One is a ghost king who waits hard in the world just to meet each other because of his obsession, and the other is a ghost master who has perfected his merits and can become a heavenly being in the next world.
Under the arrangement of fate, we gather together in the special case investigation class, what kind of sparks will be created?
A misty past life and an unpredictable future
A series of cases where human nature and morality collide...
How should he choose?