Ooh, good one. That's the shocker at the end of the Majabharata, which is sort of the Hindu "Bible."
Arjuna, the demigod we've been following for about 6,000 pages (this is a THICK book!) finally gets to heaven, and the only people there are his bitter, life-long mortal enemies, all smiling, happy, waiting to give him a big hug and say "Arjuna, welcome! All is forgiven!... Oh, your wife, your brothers, your son whom we killed? They're all in hell. Sorry about that."
Someday I really have to watch the rest of "What Dreams May Come." The setup really has me hooked... the guy's kids die, a few years later he dies trying to help someone and so goes to Heaven; his wife kills herself in despair at losing her entire family, and she goes to Hell.
So he goes to find her.
Now that's a story!