John Constantine has literally been to Hell and back. When he teams up with a policewoman to solve the mysterious suicide of her twin sister, their investigation takes them through the world of demons and angels that exists beneath the landscape of contemporary Los Angeles.

When God loses faith in humankind, he sends his legion of angels to bring on the Apocalypse. Humanity's only hope for survival lies in a group of strangers trapped in an out-of-the-way, desert diner with the Archangel Michael.