How would a post-apocalyptic North America flooded by three hundred million zombies really look like? How do you defend yourself against the undead and against evil men if you're not physically fit? How do you survive once all the grocery stores have been looted? An elderly Swiss tourist, stranded in Memphis after the outbreak, will tell you in Part One. After spending more than one year in America he discovers that some European countries have managed to hang on, albeit with a decimated population, and he returns to his country thanks to the French navy. In Part Two he goes back to the wastelands of North America as advisor to a French scientific expedition. Their road trip takes them to the Gulf coast, West Texas, Kansas and the Appalachians. They return with important information about the zombies and the few survivors in America. In Part Three he returns once more, this time as advisor to a battalion-sized French army unit. The results of these expeditions and the research carried out in Europe lead to the discovery of the origin of the pandemic.