At first there was just a small, nondescript photo of Zoe Walker and an unknown phone number in the classifieds section of a London newspaper. A prank? Misunderstanding? Silly joke? This is what Zoya’s family and friends think. But she herself is haunted by a terrible suspicion: is someone really watching her? The way she goes to the train every morning along the same road, waits on the platform, sits in her favorite seat in the carriage ?Everyone around thinks that she is being paranoid. And the next day a photo of another girl appears in the same place. And then another... And gradually the women whose photographs ended up in the newspaper, one after another, become victims of brutal attacks. Now Zoe is absolutely sure: she is next on the terrible list of the mysterious criminal...