As their lives take them in different directions, Lena, Tibby, Carmen, and Bridget discover many more things about themselves and the importance of their relationship with each other.
The members of the Sisterhood of the Traveling Pants graduate from high school and spend their last summer before college learning about life and themselves.
Ama, Jo, and Polly, three close friends from Bethesda, Maryland, spend the summer before ninth grade learning about themselves, their families, and the changing nature of their friendship.