It all starts during her commute home one night. Zoe Walker glances through her local paper and sees her own face staring back at her in a classified ad. With the grainy photo is a phone number and a listing for a website called FindTheOne.com. In the following days, she sees other women in the same ad, a different one every day, and nearly all of them show up in the newspapers as victims of increasingly violent crimes--including murder. With the help of a determined cop, Zoe uncovers the ad's twisted purpose...And suddenly, the man on the train sitting across the car--the one smiling at Zoe--could be more than just a friendly stranger. He could be someone who has deliberately chosen her and is ready to make his next move...