Ten year old James is a social outcast, spending most of his time in his room. His action figures are his only company until one day a voice comes from his air vent. The voice belongs to a girl named Meredith who James believes to live in the wall. Is Meredith real? If so, who is she? How did she get there? These are all questions to be answered in the short story, My Best Friend Lives in the Walls.