In Roadside Crosses, Special Agent Kathryn Dance (a body language and “kinesics” expert) investigates a chilling case: crosses are appearing along highways — but they’re not memorials for past deaths. A teenage girl is found in the trunk of a car, having apparently been kidnapped. Kathryn realizes the crosses are linked to a vengeful killer who is using personal information shared on blogs and social networks. She must race against time to stop more killings in both the online world and real life.