In life, we are plagued by the uncertainty of an afterlife, and it is often expected that when we die, everything will suddenly make sense. But when a group of strangers, similar only in their time of death, find themselves in the afterlife, they are faced with more questions than ever before.

Are they in Heaven or Hell? If they're in Heaven, why is there a Nazi wandering around? Why are there no children? If they are in Hell, what universal law did they break? Is there a way to repent and move on to a better eternity?

At least one man seems to have some answers. Marcus, a Roman dead for 2,000 years, gains the group's trust by leading them through the perils of their new reality. But soon it becomes clear that Marcus is only telling them half the story.