Cassie's life has been going pretty good, lately, especially since she and Dex decided to move in together. All that changes suddenly, however, when she finds herself running late for work at the Outreach Center and arise just in time to see the building blown up. Thinking that her friends are all dead, Cassie is devastated, but then she learns that the bomber was actually aiming for her. Working with a new police detective, Cassie is determined to catch the madman behind the bomb, but he isn't finished. Everything he does is designed to bring Cassie as much pain as possible, even to the point of targeting the shelters where families are housed. When he begins taunting her directly, Cassie becomes even more determined to bring his reign of terror to an end. And then she learns the horrifying truth. The reason the bomber is out to destroy her life, is because he blames her for destroying his own — and the only way he will stop, he claims, is if Cassie can find him and stop him. It's a horrifying game of cat and mouse, and Cassie isn't sure which part she's supposed to be playing.