Answer:
Hey! I'll try to help you as much as I possibly can.
A possible Main Character: (please Please PLEASE keep in mind that this is fiction)
Katherine: A Young girl of 16 trying to find her father who rushed off to the Klondlike Goldrush. Her father has not been writing anymore letters. or answering them for that matter. So Katherine thinks it's up to her to bring her father home.
Theme: Family, Friendship, Love, and Perseverance.
Event for Family: Obviously, this event will include her father. You could have someone offer Katherine a lot of money in exchange for her father (people did that back in the day, which is pretty sad) But Katherine says "No." and that shows that family is important.
Event for Perseverance: You could have Katherine go through many different trials and bumps along the way to finding her father. She could almost drown, get killed by a bear, and have trouble hiking up a mountain.
Event for Love: Many great stories have romance in them. Try giving Katherine a smart, handsome young man named Peter. Who helps her find her father and (perhaps) gets married to her in the end.
Event for friendship: Have Katherine make many friends along the way. It doesn't matter who they are, but make sure to let her expierience friendship.
Explanation:
I truly hope I have helped! :)