An out-of-the-way diner becomes the unlikely battleground for the survival of the human race. When God loses faith in humankind, he sends his legion of angels to bring on the Apocalypse. Humanity's only hope lies in a group of strangers trapped in a desert diner with the Archangel Michael (Bettany).

Brad and Kate have been together three years, in love, having fun, doing all sorts of things together with no intention of marriage or children. Christmas morning, they're on their way to Fiji, having told their two sets of divorced parents that they're off to do charity work. Through a fluke, they have no choice but to visit each of their four idiosyncratic parents. As the day progresses, Brad and Kate remember growing up, each learns more about the other, and Kate realizes that her life may...