What would you do if you--and only you--learned that the end of the world was about to occur? Unfortunately for Catherine Hayesly, she's about to find out.

It had been six long years since Catherine's last vacation. In another few weeks she and her family would finally commence their dream trip of a lifetime. But then came the call. The one that her high-ranking military husband, Warren, had warned might someday arrive. With a fateful string of cryptic words, Catherine is forced to jettison not only her vacation plans, but also any future hope of a normal life.

With the clock ticking and her mind reeling, Catherine must begin the task of collecting each of her three children and setting out on a pre-planned course of action that, up until this day, had seemed paranoid at best, preposterous at worst. With her only goal survival, Catherine must escape the city and adhere to "the plan" until such time that she is able to reunite with her husband and get her family to safety. But confronting her at every turn is the event itself and the enigmatic origins surrounding it and all that it has wrought.