Hell is empty and the devil is in the world.
Why do good people not live long, but evil people live happily? If the resentment is not too deep, who would be willing to become a ghost and wander around the world? Bai Poxiao, who has never believed in ghosts and gods, had to start dealing with ghosts after dying once.
However, while others chanted sutras and preached truth, he helped the ghosts to avenge themselves...