Summary
In a world dominated by nanotechnology and artificial intelligence, society is divided into three vertical strata: the elite in Zênite, the middle class in Centralia, and the underworld in Netheria. Akiko, a medical researcher in São Paulo, grapples with grief after losing her beloved.
One day, Akiko receives a posthumous letter inviting her on a journey that promises long-sought answers. Despite her fears, she embarks on this quest, reopening old wounds and questioning the world she lives in. As she delves deeper, Akiko uncovers secrets about her past and the divided society around her, leading to profound revelations.
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