In the age of tumblr, fanfiction and fanart, Cath is a relateable character for any teen who has geeked out over a book, tv show or movie. Starting her freshman year of college, Cath is facing several new obstacles. Her twin sister Wren doesn't want to room with her so “they can meet other people.” She is dealing with her father’s mental illness. And college has taken time away from completing her epic online fanfiction Carry On written in the world of Simon Snow (a character reminiscent Harry Potter). On top of it all, Cath might be falling in love with her roommate's boyfriend.