The Tunnel Under the World recap

Guy Burckhardt wakes in Tylerton after dreaming of a catastrophic explosion and starts June 15 amid unusually intrusive advertisements. Uneasy repetitions and the frightened behavior of his coworker Henry Swanson persuade him that the day and the people around him are being manipulated. Their investigation exposes artificial features beneath the city's familiar surface and leads Burckhardt through hidden passages toward the world outside. He discovers that the original Tylerton was destroyed and that the present city is a scaled reconstruction populated by mechanical copies of its residents. Dorchin's organization repeatedly runs the same date as a controlled market-research experiment, changing advertising campaigns, measuring reactions, and erasing the subjects' memories between trials. Burckhardt reaches the truth but cannot end the experiment; to its operators, his awakening is only another result to manage before the cycle begins again.

Guy Burckhardt wakes screaming from a dream in which an explosion destroys his city, then finds that the date is June 15 and begins his commute through Tylerton. Advertising is unusually forceful and seems to intrude into private thought. At work, Henry Swanson's fearful behavior adds to Guy's suspicion that familiar events are repeating and that their surroundings are being controlled. Attempts to test the world reveal artificial features behind people and places that should be ordinary. Following the concealed routes beneath and beyond Tylerton, Guy eventually reaches the boundary of the environment. The city is a model inside a much larger laboratory. The original Tylerton was destroyed, while its residents were reconstructed as mechanical imitations retaining their personalities. Dorchin's organization uses the population for advertising research, running June 15 again and again with different campaigns, observing the responses, and clearing memories before another cycle. Guy's discovery does not liberate him: the operators still control the model and treat his resistance as part of the experiment.

Burckhardt forces his way beyond the apparent city and discovers that Tylerton is a constructed model in a much larger laboratory. The real city was destroyed, and its inhabitants have been reproduced as mechanisms whose personalities and memories imitate the dead residents. Each repeated June 15 is an experimental cycle: advertising methods are imposed on the artificial population, their responses are measured, and their memories are reset before the next trial. Dorchin explains the project from the scale of the outside world, reducing Burckhardt's struggle for truth to an irregularity in a commercial test. Burckhardt cannot free the city or carry the discovery into a normal future. The experimenters retain control of the environment and its resets, leaving him and the other reconstructed inhabitants trapped inside a day designed to make their behavior useful to advertisers.