Thirteen-year-old Lulu Carter has the anomaly of a picture-perfect memory--a detail she only shares with her grandmother and confidant. When she discovers that her grandmother is losing her memory she believes it is not dementia, but a suppressed trauma from her childhood, so she sets off in search of learning about her grandmother's past, and after she uncovers abuse, she wonders if she should have left the past alone. Includes an anatomical illustration of the brain and chapters that begin with explanations of brain functions that relate to the story.