Mockingbird Don't Sing

From the age of one and a 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. (official distributor synopsis)