The novel is set in a mysterious world where enigmatic Mentors run a sociological experiment. The mentors gathered volunteers from Earth from various places and times: from Germany of the 1940s, the USA of the 1960s, Sweden of the 1970s, etc. The volunteers do not know the goals or conditions of the experiment.
In this novel, a hidden world is depicted where mysterious guides conduct a social study. Volunteers from various parts of Earth and different time periods are brought together: Germany in the 1940s, America in the 1960s, Sweden in the 1970s, and so on. The participants are kept in the dark about the experiment's purpose or constraints.