Death and the afterlife are elusive mysteries, unless you're a group of people recruited at the moment of death to fight aliens. Gantz, a mysterious black orb in the middle of an apartment building, has pulled random strangers together to fight for their survival and presumably for the survival of humanity. Gantz isn't picky: high school students, street thugs, dogs, or little old ladies are fair game to carry guns and chase down aliens. Oh, and if you try to escape? Well, don't try to escape.