The book is the diary by Werner Herzog. It was written and takes place between November 23 and December 14, 1974. In the foreword Herzog says that he had a call from a friend in Paris, informing him that his close friend and film historian Lotte Eisner was ill, and was probably going to die. He sets off to Paris from Munich believing that he would save Eisner from death by arriving on foot. The book is the complete diary during his journey, only a few private remarks have been omitted.