Elysia is a clone, created in a laboratory, born as a sixteen year old girl, an empty vessel with no life experience to draw from. She is a Beta, an experimental model of teenaged clone. She was replicated from another teenage girl, who had to die in order for Elysia to be created.
Elysia's purpose is to serve the inhabitants of Demesne, an island paradise for the wealthiest people on earth. Everything about Demesne is bioengineered for perfection. Even the air there induces a strange, euphoric high that only the island's workers—soulless clones like Elysia—are immune to.
At first, Elysia's new life on this island paradise is idyllic and pampered. But she soon sees that Demesne's human residents, the most privileged people in the world who should want for nothing, yearn. But for what, exactly? And, she comes to realize that beneath its flawless exterior, there is an undercurrent of discontent amongst Demesne's worker clones. She knows she is soulless and cannot feel and should not care—so why are overpowering sensations clouding Elysia's mind?
If anyone discovers that Elysia isn't the unfeeling clone she must pretend to be, she will suffer a fate too terrible to imagine. When Elysia's one chance at happiness is ripped away from her with breathtaking cruelty, emotions she's always had but never understood are unleashed. As rage, terror, and desire threaten to overwhelm her, Elysia must find the will to survive.