After moving to an upscale lakeside Chicago suburb in July of 1976, Susan and Bruce Miller must confront temptation in the form of their provocative new neighbors, Tom and Trina Decker, while not abandoning their old friends Janet and Roger Thompson. As the adult couples evaluate whether to embrace or avoid newfound personal freedoms, the curious Miller and Thompson children begin to discover and assert their own morality and sexual identities as they come of age in a world on the precipice of change.