In the 1950s, brothers Jacey and Doug Holt, who come from the poorer side of their sleepy Midwestern town, vie for the affections of the wealthy, lovely Abbott sisters. Lady-killer Jacey alternates between Eleanor and Alice, wanting simply to break the hearts of rich young women. But sensitive Doug has a real romance with Pamela, which Jacey and the Abbott patriarch, Lloyd, both frown upon.
When Ann, husband George, and son Georgie arrive at their holiday home they are visited by a pair of polite and seemingly pleasant young men. Armed with deceptively sweet smiles and some golf clubs, they proceed to terrorize and torture the tight-knit clan, giving them until the next day to survive.
Marc and Rebeca, a young couple, travel to an old country house that used to belong to their family. Once there, they write the shared history of their roots, creating a huge family tree that harbours relationships of love, heartbreak, sex, madness, jealousy and infidelity, and under which also lies a history laden with secrets.
Reluctant to let go of college life, a close-knit team of seven friends--irresponsible saxophone player Billy, young Republican Alec, his girlfriend Leslie, struggling journalist Kevin, drama queen Jules, lovesick waiter Kirby, and Wendy, a social worker with a heart of gold--realise the party is over. And as the burdens of maturity close in on the young dreamers, the complexities of adulthood and the daily struggle of growing up put their sacred friendship to the test. But everyone knows life is not a bed of roses. It won't be easy, but when all is said and done, what will it take for St. Elmo's clique to find its place in the real world?