"We all die eventually, that's when we have to see what lays beyond that door at the end of our life; and how our actions in the living may affect our afterlife."

After an early death, a young man finds himself in purgatory. Being greeted by an angel, he was surprised to find that they were impressed by his work during his life and wanted to hire him as a case/social worker for the souls in purgatory. While it's better than hell, many are still chained by their sins during life and can fall victim to being completely corrupted by them. From fighting demon monsters to helping people who regret stealing a candy bar, someone has to help these lingering souls as they repent. Seems like some work is never done, even after death.