The book is set in 1999 (25 years in the future, as seen from 1974) and consists of the diary entries and reports of William Weston, a mainstream media reporter who is the first American proper to investigate Ecotopia, a newly formed country that broke from the USA in 1980. Prior to Weston's investigative reporting, most Americans had not been allowed to enter the new country, which is depicted as being on continual guard against revanchism. The new nation of Ecotopia consists of Northern California, Oregon and Washington; it is hinted that Southern California is a lost cause. The book is presented as a combination of narrative from Weston's diary and dispatches that he transmits to his publication, the mythical Times-Post.