Set years into a future where humans have backed themselves into an untenable position, the story focuses on two twins, Mika and Ellie, with unique gifts that powerful people intend to exploit.
Forty-three some years ago, a plague was set loose from a lab that infected animals and made them attack humans, so humans built a big wall and moved behind it, supposedly enacting a scorched-earth policy on the rest of the world. But if you take the world's population and compress it into 1/3 of the space you had before, things are going to get cramped. And once the good old Animal Farm mentality comes into play, those "born more equal than others" are going to start taking everything for themselves, leading to a lot of unrest and discontent.
Enter time of story, where Ellie has been taken by the Youth Development Foundation and her family made to think she died. Only her twin brother Mika believes that she is still alive. Mika gets into trouble for refusing to believe that Ellie is dead. But when strange things start going on at his school, like all the kids being made to drink the Fit Mix, and go through rigorous physical training, as well as fly pod simulators, Mika begins to realize that something is very wrong and his growing understanding of the YDF's plans could get him killed.
By novel's end, Ellie and Mika have been reunited, but the world they knew is coming crashing down. War is looming, but they may just have the advantage...
As a debut novel, fantastic job. Some of her similes I found frustrating, as she seems to employ them where a simple description would function just as well, or where the simile will not necessarily make sense in the future. You don't want to date your work overly much. And I am never a fan of cliff-hangers, but I do look forward to seeing where she takes this story.