An elderly lady named Betty contacted the police. She has been living in a small house located in a prosperous, calm area for more than a dozen years with her husband. They have known their neighbors for many years and never got into trouble. But recently, a young girl came to an elderly couple and said that she was their daughter. Indeed, a few getts ago, their daughter disappeared, they searched for her for a long time, but they never found her, and now she showed up. Soon after, the house was robbed and the girl disappeared. Detectives Mark and Karen took on this interesting and unusual case. They will have to investigate both the robbery and the disappearance of a person in Mysterious Daughter.