@Tfmonkey The story about the man and his imaginary girl already exist. It is called the quest for the Time Bird.
Brace yourself, because this is going to hurt.
An old man raises his daughter alone in the wilds. He receives a message from his former lover who tells him to go on an adventure to save the world. He does for his daughter’s sake.
When the evil is defeated, he realizes that he had been manipulated by this evil bitch.