13 Years Have Passed

Have you ever been friends with someone, but has been gone for 13 years? This book is based on a BFF relationship, Clara and Violet, they havent seen eachother for 13 years, when Clara have moved away from Violet for 13 years, their relationship has been gone, when Clara come back to Violets hometown, Clara turned into a know it all person and Violet had turned into a popular person, how will they be BFF?