This film is a groundbreaking study of a hugely popular, underground sub-culture: swinging. The filmmakers spent a year with three sets of swingers. Their subjects define themselves not through jobs or politics, but through their sexuality. James and Theresa are classic swingers who aggressively seduce couples wherever they go. Their protg Calvin attempts to share his sexual freedom with two jealous lovers, Sara and Julie. Psychodrama almost displaces sex for Shannon and Gerard, who aren't sure whether swinging is the way to go to preserve their marriage. By embracing a free sexual lifestyle, all of these swingers have to constantly deal with issues of trust, power, intimacy, and love.