Bridget, Carmen, Lena and Tibby are best friends living in Maryland. After many summers together, the four are finally going their separate ways for a few months: while Bridget heads to Mexico, and Lena visits family in Greece, Carmen and Tibby stay closer to home. No matter where they are, they are connected by a pair of jeans that they take turns sharing -- pants that fit all four girls and exemplify their tight bond.