Mara is fearful - all the time. It's quite normal for people to experience anxiety sometimes, but if Mara thinks someone might have hacked her email account, she quite simply can't see. She also struggles to trust anyone. So when her boyfriend breaks up with her and a work colleague she considered a friend tells her she isn't, things start to go a little wrong for Mara. She avidly reads books about serial killers to try to understand them better, but she slowly starts to wonder if there isn't something more useful to be gleaned from all that reading.