Step Brother's Friend

Kara and her father, Joe, moved from Detroit to Texas. Kara didn't know her father had got married, and the same thing goes for Kristen. Kristen didn't know his mother got remarried. Oh, one reason they don't like each other is because Kara is black and Kristen is white. Kristen and Kara are going through ups and downs, but at the end when it comes to their brother/sister relationship, will Kristen protect Kara or blow her off. Can Kara and Kristen get along?