Re: Kill the person above you.
The plot was something along the lines of some evil god's or demons or some such were trying to corrupt the pillars that held the world between the heavens and the abyss so that they could draw the world into the abyss. Because of the damage caused by the time the good deities and beings realized this, when they tried to incarnate themselves as humans their memories and most of their powers were sealed. All that was basically left was a signature power and the desire to find and defeat the evil presence.
Of course, you could always have a plot where humanity accidentaly fractures the space-time continuum with space age technology and the divine beings get trapped in human bodies, not sure what the plot their would be though.