Julie Vorov thought her job was to do well in high school and stay out of trouble. She also thought her biggest problem was betraying her best friend by hooking-up with a traitorous boyfriend. But in a world where being human is just a matter of programming, everything changes. Suddenly, Julie finds herself allied with a scrappy group of alien scientists whose own world has already been destroyed. Together, they mount a clandestine effort to stop the Earth from also being eradicated. And Julie discovers that she's the pivotal instability-the tipping point-in the plans of another group of aliens bent on invasion. As Julie battles to save everything she cares about, she uncovers secrets about her own origins that shatter the core of her beliefs. And she falls so deeply in love that the most extreme obstacles posed by loyalty, age, gender, species, and parents will have to be overcome. Your heart always recognizes the one you love.