With their first wedding anniversary just passed, retired Marine Corps Colonel Win Kirkland and Sheriff Sarah Pitt are more in love than ever and making plans to adopt two orphaned girls from Afghanistan. With their most challenging case behind them, the only threat on the horizon seems to be the approaching blizzard. But a much more dangerous storm is about to hit with a force that will exact a terrible toll on Win and Sarah's loved ones, their love and their lives.

A shadowy network has chosen McCrumb County, Indiana, as a testing ground for one of the deadliest threats facing the United States. Their ruthless psychological and physical attacks quickly escalate to murder, but who are these people? And what is their end game? Even Win's former intelligence colleagues seem stumped.

As Win and Sarah risk everything to identify and stop the perpetrators, they are quickly learning that what doesn't kill you...is waiting to try again.