Mary Westin is either seeing things or going insane. Her boring life has been turned upside-down by the murders happening around her. And if she doesn't find a way to prove her innocence soon, she will spend the rest of her life in prison.

What happens when a plain, everyday woman suddenly becomes a murder suspect? Mary finds out soon enough when her ex-husband is murdered, and then her boss. Then, family secrets are revealed to Mary, complicating her life further. Who is the person imitating her, and who's sending the creepy messages? And why?

When Detective Ryan Hodges arrives on the scene to investigate the murders, Mary is thankful that someone finally believes she's not a killer. But all the evidence points directly at Mary. The scariest thought of all for Mary is that maybe no one is following her or committing the murders. Maybe Mary has finally lost her mind.