The story follows Rio Ko, an average teenager in Elysium, the super power government of the human colony. The biggest drama in her life was the choice to attend a math class instead of the more popular language class as her whole planet prepares for for the arrival of a new wave of colonists, the Fata Humani Generis (The Fata of the Human Race).

That is until the Fata arrive.

Rio gets to finally find out if her government has been telling the truth about the Fata. Whether the Fata are their enemies, their friends, or something completely different. She has to face hard questions about world view. Who is in the right, or in the wrong.

Rio finds herself at several cross roads: Is she making the decisions that will enable her to survive? Or does she survive because those decisions reflect the character of a survivor? Does Rio transform from an innocent school girl to the leader of the Enemies of Human Race? Or is her true nature simply uncovered? Is surviving enough? Every decision matters, there are many ways for Rio to die, but only one way for her to live.