A Summer Place is a 1959 American romantic drama film based on Sloan Wilson's 1958 novel of the same name, about teenage lovers from different classes who get back together 20 years later, and then must deal with the passionate love affair of their own teenage children by previous marriages. Delmer Daves directed the movie, which stars Richard Egan and Dorothy McGuire as the middle-aged lovers, and Sandra Dee and Troy Donahue as their respective children. The film contains a memorable instrumental theme composed by Max Steiner, which spent nine weeks at number one on the Billboard Hot 100 singles chart in 1960.
Plot
Alcoholic Bart Hunter (Arthur Kennedy), his long-suffering wife Sylvia (Dorothy McGuire), and their teenage son Johnny (Troy Donahue) operate a crumbling inn on Pine Island off the Maine coast. The inn was previously Bart's elegant family mansion in an exclusive resort, but as his family fortunes have dwindled, the Hunters are forced to rent rooms to paying guests. Bart receives a reservation request from an old acquaintance, Ken Jorgenson (Richard Egan), who was a lowly lifeguard on the island 20 years ago, but is now a successful research chemist and millionaire. Ken wants to bring his wife and daughter to the island for the summer. Bart suggests that Ken is just coming to lord his new wealth over Bart, who is no longer rich. Bart wants to refuse the reservation, but Sylvia insists that he accept because they badly need the money, even going so far as to move themselves into the small guest house so their own master bedroom suite can be rented to Ken and his family.
Ken arrives with his wife Helen (Constance Ford) and teenage daughter Molly (Sandra Dee). Helen and Ken have an unhappy marriage, sleep in separate bedrooms, and frequently argue, including over proper behavior standards for their daughter. Helen is a prude who disapproves of Molly's developing figure and interest in boys, particularly Johnny Hunter, who is also attracted to Molly. Ken is much more relaxed and permissive, and tells his daughter that her lustful desires are not shameful. Helen also tries, unsuccessfully, to put on airs and impress the upper-class residents of the island, while Ken is not interested in pretense and is even happy to talk with older people who remember him from when he worked as a lifeguard.
As it turns out, Ken and Sylvia were lovers 20 years ago, when they were teenagers. It soon becomes apparent that they still love each other and have missed each other for many years, and that Ken returned to Pine Island in hopes of seeing Sylvia again. They had broken up because Ken was a poor college student, while Bart was the son of a rich, established family, so Sylvia married Bart, and Ken, after seeing Sylvia's wedding announcement in the newspaper, married Helen. Both marriages were unhappy, but Ken and Sylvia stayed in them because of their love for their respective children, Molly and Johnny. Ken and Sylvia find themselves drawn to each other again and begin secretly meeting every night. They are soon spotted by the island's night watchman, who informs Helen. Helen initially keeps quiet, on her mother's advice, planning to catch them in the act to ensure a large divorce settlement.
Ken goes on a business trip for a weekend, during which time Molly and Johnny, with Ken's permission, go sailing around the island. Their boat capsizes in rough water, stranding them on the beach overnight. The Coast Guard rescues them the next day, but Helen is suspicious that the teenagers had sex on the beach, although they deny it. Helen sends for a doctor to forcibly examine Molly to make sure she is still a virgin, finding she is. Horrified, Molly runs away and sees Johnny, who threatens to kill Helen if she hurts Molly ever again. Helen contacts law enforcement, and then in a fit of anger, reveals Sylvia and Ken's affair in front of Bart, Ken, Sylvia, and Johnny. Bart reveals he has long known about Sylvia's love for Ken and offers to forgive her, but she cannot go back. The Hunters and Jorgensons each go through an acrimonious public divorce and Molly and Johnny are sent to boarding schools several states apart. Molly and Johnny are angry at Ken and Sylvia and stop speaking to them, becoming increasingly dependent on each other for emotional support, despite Helen's constant interference and criticism of Molly's morals.