From the age of one and half years to thirteen, Katie (Tarra Steele) was imprisoned by her mentally deluded parents. She was locked in a room, tied and immobile since bound to a "potty chair" where she endured years of isolated silence punctuated by brutality. When her case finally came to public attention she was moved to a hospital in Los Angeles, where it was discovered she had never been taught to speak. She was incapable of understanding any language. Katie was an anomaly, a modern day Wild Child. With this heartbreaking story, the world was introduced to a fragile, beautiful teenager who behaved like an infant. Medical and phsycological doctors descended on the girl in droves, often with their own selfish motives. Instead of being helpful, the experts often hurt her even more. With stunning care to detail Mockingbird Don't Sing tells Katie's story of imprisonment, discovery and her difficult road to joining the human family as a beautiful young woman.