Lisa is on a train, 20 miles from home, when the United Kingdom is hit by a terrifying bioterrorist attack, and a national emergency is declared. After she was separated from her husband, Neil, in the hours following the September 11th attack, she made him promise that, in the event of a similar crisis, their priority should be to go home and wait for each other there. Keeping her promise, and trusting Neil to keep his, she sets out on what she believes will be a quick and easy journey. But the world she once knew has changed forever and has become deadly and unpredictable. Will she make it back home to Neil? Will he be there? Will he wait for her?
