Fourteen-year-old Avery Armisted is athletic, rich, and pretty. Sixteen-year-old Kayla Butts is known as butt-girl at school. The two girls were friends as little kids, but that s ancient history now. So it s a huge surprise when Avery s father offers to bring Kayla along on a summer trip to Spain. Avery is horrified that her father thinks he can choose her friends and make her miss soccer camp.