In a post-apocalyptic world decimated by a global war, humanity clings to survival within the confines of Olympus, a utopian city governed by the bioroids—genetically engineered beings created for the sole purpose of maintaining peace and order. Bioroids are incapable of extreme emotions that often lead to conflict, thus they are perceived as the perfect inhabitants to prevent future wars. Deunan Knute, a skilled human soldier, scours the wastelands, oblivious to the cessation of hostilities, until she is unexpectedly reunited with Briareos, her former lover, who has been transformed into a cyborg due to injuries sustained in battle. Together, they're taken to Olympus, where they adjust to a society radically different from the anarchic wilderness they've known.

Amidst the technological marvels and political intrigue of the city, the protagonists uncover a conspiracy that threatens the delicate balance between humans, bioroids, and the artificial intelligence that oversees them all. Forces within Olympus aim to manipulate the future of humankind through the control of data crucial to bioroid reproduction. As tensions rise, the tenuous line separating the humans from their engineered counterparts blurs, stirring a conflict that may shatter the fragile peace that the city's architects fought so hard to establish. Deunan and Briareos must confront their own identities and the very meaning of existence in a rapidly changing world, as they are drawn deep into the heart of this brewing storm.