Interitum is the line beyond which the Underworld begins. Hell or Heaven? You won't know until your time comes. Does this Underworld exist, about which so many books and treatises have been written? Doctor Atzt, by the will of evil fate, dies in the prime of his life. Life ended and... an adventure began?! Everything is mixed up, both Heaven and Hell, for it is said: “What is Paradise for one will become hellish torment for another. And there will be groaning and gnashing of teeth...”