The upper city has exclusive sixteen hours of daylight, while the lower city only has eight hours of darkness and dusk. An invisible time barrier separates two worlds that will never blend.
Lin Yan was once the top data analyst at the Shangcheng Time Planning Bureau, but because he exposed the secret of time resource reselling, he was framed and exiled to the lower city, where he became an inconspicuous terminal repairman. In the past three years, he has tempered his talents and used terminal repair as a cover to secretly weave an intelligence network spanning the upper, middle and lower levels - he is a natural chess player, and every calculation step hides the foreshadowing of the next ten steps, and he vows to tear open the iron curtain of class solidification.
It's just that this genius chess player has a fatal shortcoming: he doesn't believe in emotions, only data, and regards "rationality" as the norm. Until his closest friend A Yuan, due to his indifference and misjudgment, was used as an experimental subject by Zhang Cheng, a senior executive at Shangcheng. In the "Time Harvest Project", time energy was forcibly extracted and turned into a puddle of withered ashes.
