Mio

From what I remember there was a family of four. A Mum, Dad and daughter. They adopted a girl who could not walk very well. The two girls, despite not being related by blood, got on really well. When the daughter was taken ill she had to go and stay in hospital. The Dad became bitter (and I guess the Mum did too?), and started to lock their adopted daughter in a room. (I'm not sure why, he was frustrated and scared for his daughter and took it out on the other, perhaps? I get a vague feeling that maybe he wished it was her who was taken ill, and not their daughter!) He also locked the girl up when he and the Mum went out to the hospital. (Were they ashamed to be seen with her?) One locking didn't go according to plan though, and she was able to escape!