The protagonist loves reading one day she got trapped in her favorite book, or so that's what she thinks. Her so called "trapped in a book" is not real for she had actually travelled back in time where magic and other fantasy creatures used to exist. It was all planned and all bound to happen in the first place. Her real parents were from that timeline which explains why it was all bound to happen. Her destiny is to change the whole story and change the ending to save her kingdom and all the people, creatures, wizards and her people there.