Sarah promised Marjorie when they were five years old that they would be best friends forever. But that was before seventh grade, when everything changed -- everything except Marjorie. While Sarah wants to meet new people and try new things, Marjorie still likes doing the same things they always did. It seems the more time the two girls spend together, the more time Sarah wants to spend apart. How did a promise that was so easy to make become so hard to keep?