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 . . .