Mat and Alan, estranged brothers, reunite just before Alan leaves for a vacation with his girlfriend. When he returns sooner than expected without his girlfriend, Alan finds Mat and his family have moved into his apartment.

Growing up in a rural town filled with violent delinquents, Jack has learned to do what it takes to survive, despite having an oblivious mother and no father. After his aunt falls ill and a younger cousin comes to stay with him, the hardened 15-year-old discovers the importance of friendship, family, and looking for happiness even in the most desolate of circumstances.

Four young women continue the journey toward adulthood that began with "The Sisterhood of the Traveling Pants." Now three years later, these lifelong friends embark on separate paths for their first year of college and the summer beyond, but remain in touch by sharing their experiences with each other.