Four high school friends spend a summer in northern California to sort out their love lives. Cassie, unlucky in love, falls for a biker. Julie, who married her high school sweetheart too young, wonders if the spark is gone from her marriage. Marty feels trapped in a loveless marriage and is contemplating an affair. Beth, a successful doctor, struggles with health problems and her attraction to a coworker. This summer, teetering on the threshold of thirty, these four women are going to need each other more than ever.