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Heaven and hell are vying for human souls in vortices between humanity and the afterlife. When Lucifer and his demons overwhelm Archangel Michael and Gabriel, heaven is faced with the possibility of losing all souls on the planet.
Reincarnated in heaven, Michael must fight his way back to Earth to stop more demons from swarming the planet and help his brother Gabriel track down the devil before he tricks humanity into harvesting billions of souls into his fiery kingdom.
God had so much faith in humanity that he bet our souls on it. Those whose deaths are caused by other humans are sent to Lucifer. God gets the rest. Sucker! Lucifer comes to Earth to stir up trouble in order to collect more souls for a project he has in the making. Even he has to admit its just too easy to pit man against man.
It was supposed to be about how we, as human beings, are ultra-violent and how we may be focusing on the wrong parts of religious texts and making things much worse (from an afterlife perspective, in this one).
I thought this story was fascinating. The main idea is that any death caused by man works against God. It's kind of common sense in a big idea kind of way. As a story, it flows quickly and easily, and will grip you. It's short, but very rich.