Ken and Helen Jorgenson (Richard Egan and Constance Ford) look forward to a pleasant summer at the shore with daughter Molly (Sandra Dee). When Ken rekindles a torrid 20-year-old affair with local island resident Sylvia Hunter (Dorothy McGuire), scandal sweeps the seaside paradise. Melodrama doubles when the adulterous pair's children begin their own romance. Troy Donahue appears in his first feature role as Molly's boyfriend, John Hunter.