Madison Avery is a young woman with a huge problem. From her penthouse apartment, she witnessed a murder in the building across the street, but by the time the police arrived, the crime scene had been wiped clean. Unfortunately Madison suffers from prosopagnosia - face blindness - so even though she had a clear view of the murder, she can't describe the victim or the killer. With no forensic evidence that a crime was committed and no description of the victim to match to a body, the police have no choice but to close the file.
But Shaye Archer doesn't have the same limitations.
When Shaye hears Madison's story, she believes the young woman saw exactly what she claims, and even though Shaye knows finding the killer will be next to impossible, she can't turn down the distraught woman. Especially when she finds out that the killer saw Madison. Soon the killer turns his attention to Madison, taunting her to heighten her fear, and Shaye is afraid his sights are set on his next victim.