Jack and Anna are dead. Not romantic vampire dead. Not even night-of-the-living dead, but really dead.
At least Jack is. Anna might just be having a near-death experience. It's surprisingly hard to tell. Either way, they're on a path through the afterlife; where Death wears a polo shirt, factories manufacture broken things, and forests try to trap you. To make it through, they have to stick together.
But sticking together would be a lot easier if they weren't both keeping secrets. Anna is awesome at pretending everything is fine...until she isn't. Meanwhile, Jack is afraid he's gone crazy and this whole adventure is part of his delusion.
Somehow, they're going to have to trust each other if they want to make it through to the other side -- wherever that is.