The friendship between girls written on the jeans is melodious and extremely warm. Perhaps it was God's arrangement that the fate of the four girls Carmen, Tibby, Leena and Bridget was destined when they were all in their mother's womb. Born at the same time in late summer, they had very different personalities but were like sisters since childhood. In the summer of the year when I was sixteen, the four sisters faced separation for the first time and each spent a summer without each other. Unexpectedly, they found a pair of jeans that all fit the four sisters with very different bodies. As a result, the magical jeans became a token of friendship, accompanying them on their respective journeys. The bold and unrestrained Bridget (Blake Lively) comes to hot Mexico to join football training camp; the beautiful and shy Leena (Alexis Bridle) goes to holy Greece to outline the mystery of the Aegean Sea with a paintbrush; the impulsive and sensitive Carmen looks forward to spending a wonderful summer vacation with her father, who moved away when she was a child, and the rebellious Tibby (Abby Tabrin) is also busy recording her own TV show. Jeans carry friendship and courage between them, accompany them, learn to love, and learn to grow up.