The Secret Key

Most teenagers have secrets. Maybe you got a piercing without telling your parents. Or you have a crush on the cute girl who sits next to you in algebra. You took a pair of earrings from the mall.
But most secrets aren't dangerous. Most secrets won't get you killed if anyone knew. Most secrets don't have the weight of two worlds.

Sophia has secrets that keeps her isolated from people. Except for her family that is. Her and her siblings were all adopted. They're adopted parents were chosen very carefully, and it was all done in secret. Everything on their birth certificates is a lie. So what is the Hamilton family really hiding? What could be so dangerous that their real parents had to give them up? What does the secret key that Sophia has unlock?