Librarian Liz Martin finds herself in Hell after being hit by a bus. She's sure she wasn't a terrible person, so how did she end up here? And is the bad place even so bad? After all, Brian-the manager of Hell-is pretty cute when he's not desperately putting out bureaucratic fires and begging minor demons to clean the overflowing toilets. Despite living in her miserable apartment with an annoying cat demon named Dennis, Liz is in the very best relationship of her existence with Brian. But Satan's poor business management and shady real estate deals have done untold damage. In fact, Hell is crumbling and will soon cease to be-along with everyone in it. Liz and Brian decide it's up to them and their crew to get all the denizens of Hell aboard the last train out.