During their first summer apart, four teenage girls, best friends since earliest childhood, stay in touch through a shared pair of secondhand jeans that magically adapts to each of their figures and affects their attitudes to their different summer experiences.During summer break, longtime friends Lena, Tibby, Carmen, and Bridget each embark on adventures that they share with each other through a pair of jeans that they have decided will be worn by all and so will absorb all of their stories.