Time Portal to Berk?

I know I know, lame title! But it's kind of appropriate to this story. Oooh now I've got your attention! A young girl from our modern time falls with her horse through a portal into Berk, only things aren't as you would expect them to be. The girl was always considered an outcast in our time; will she be able to fit in when at Berk? Read please! I love this story! T; paranoid me.