Gloria Rank has lived her entire life in the dark. Blind since birth, she has made a name for herself as a respected talk radio show host in New Jersey. When her younger sister, Anna, has her identity stolen and a man is murdered outside her apartment, Anna becomes the prime suspect in an FBI investigation. But when bodies begin piling up around her, the FBI has to admit that she is being stalked by a murderer. With the FBI focused in the wrong direction, it is up to Gloria to teach Anna to use her other senses—hearing, touch, taste, and smell—which she never really had to completely rely on before to help uncover a ring of identity thieves and stop the killer from taking her life, and perhaps Gloria's as well! Their only hope for survival is an experiment in perception that will unearth heartbreaking secrets and catapult Gloria into a darkness of the heart beyond any that she has ever known.