Byleth manages to save her father's life, and clings to him after, because she would be lost without him. He is so much more than just family to her, and she doesn't know what she would do if she really lose him. She becomes determined to protect him, but there is a war brewing, and while deciding which side she falls on, she forgets to protect herself, and then... Five years later, she returns, as if no time has passed at all.