For five years, Cassie Reeser has been her brother's personal lab rat. Peter's experiments have made her a stronger, faster, better human. And she's not the only one - he's been experimenting on others as well. For five years, escape has eluded her. Until now. When she finds out he plans to sell her as a human weapon she knows it's now or never. To make her escape she'll sacrifice family bonds and leave behind the one person who's ever helped her.

Cassie's learned to shrink from kindness and to never trust anyone. She knows the day Peter finally captures her will be the day she dies. To elude her brother and save the others, she'll have to risk her body and her heart. What she doesn't expect is a chance at a normal life.

Seth Adams is used to sifting through lies to find the truth. As a former war correspondent he knows what evils lurk in the world. When he finds Cassie hiding out in his car trunk, her story sounds like a fantastical dream. But, before long, he witnesses firsthand what she's talking about when they're attacked by a group of Peter's soldiers. As a result, he goes through his own transformation into a super human and realizes the extent of what Cassie is running from. Cassie might not think she needs his protection, but he'll die before he lets her brother have her back.