Ella Longfield is traveling on a train bound to London and observes two teenage girls board, and soon they are seated with two young men carrying black garbage bags. She overhears the men flirting with the girls as well as their admission that they just got released from prison. Ella becomes concerned for the girls' welfare and considers alerting the police or even trying to figure out how to contact their families in this small community. But after overhearing something else, she decides not to. The next day, she discovers that one of the girls, Anna Ballard, is now missing. Ella is consumed with guilt and goes to the police. Soon her name is publicized and she becomes vilified by the media and is suddenly a target for hate mail and other such backlash. Fast forward to one year later and one girl is still missing, the other didn't tell the police the whole truth and is keeping a secret or two, and she is not the only one connected to this case with a secret to hide. Soon Ella finds herself a target once again, and the renewed interest in the case from a one- year- anniversary television appeal propels the case into high gear to reveal what happened the night Anna disappeared. Teresa Driscoll's fast-paced psychological thriller, I am Watching You is told in alternating point of views and its page-turning plot is developed in short chapters.