I guessed it right the first time XD Father and daughter relationship where the father goes through a struggle or addiction- the daughter sometimes becomes afraid of him but loves him. She tries to go away, to be free but the father is suffering... struggling. So she comes back into his cage to let him know "Daddy I love you and I'm going to help you." But when she's trying to help him out of the problem, he either cannot get out or succumbing to his weakness, refuses to get out and dies in it.