What happens to you when you die? Do you go to an afterlife like heaven and meet a god? Do you go to Hell and receive eternal punishment? Maybe reincarnation where you live again? Or do you just rot in a hole in the ground?
What about becoming trapped in a foal's mind in a world inhabited by magical talking ponies? Nah, that's just silly.
...
Well I've been wrong before.

Follow the life of a man as he has to experience life once more from birth to death. Only one thing its not his life, and he isn't in control of the body.