Charlotte chose the little town she calls home as a place to hide after a trip abroad goes wrong. But now she's longing for more out of life than playing it safe. So when her estranged sister - an undercover agent - is injured and unable to continue her operation, Charlotte finds her chance for adventure and agrees to fill in for what should be a simple assignment. Will has spent years searching unofficially for a close friend who was kidnapped. But after following a trail that goes cold, he's barely able to hold on to hope that she's still alive. So when his partner in an undercover operation is injured, and she tries to persuade him to train her twin to take her place, he's hesitant, not wanting to risk the life of a civilian until, with numerous lives at stake, he finally relents. Then, when he starts falling for Charlotte, he can't face the possibility of losing another person he cares for, and he tries to sway her to give up and go back to the safety of her suburban life. But when things don't turn out how anyone expects, Will and Charlotte find themselves in a fight they never anticipated, the outcome of which could end all of their lives.