Mysterious

they call her ally. she is the girl with the mystery past and all the questions. She old girl in young disguise. they call him doctor. he is the man with an open past and all the answers. He is an old man with a young face. how wouldn't they get along? together they seem like fire, burning the universe. Who is this girl? can the doctor help her and make things right within her life? or will it make things worst. why does it seem like time is trying to keep them apart.