The film takes place in 2044.
The title Zenith can be seen as a surface reference to the titular book in the film that details a plan by the elites to plunge civilization, once it reaches its peak, into a decadent and painful collapse. Also, the title can refer to several characters (a priest, a medical school student, and a stockbroker) who all reached a zenith in their lives only to be followed by terrible declines.