Frankie and Dolores are two young lovebirds heading to the beach for what Frankie assumes is a private romantic getaway. However, dissatisfied with her relationship and unwilling to be alone with Frankie, Dolores has invited several of the couple's friends to stay at the beach house with them. Frankie is intensely upset at finding other people at the beach house and feels betrayed that Dolores misled him. Meanwhile, an
anthropologist, Professor Robert Orville Sutwell, is staying at the beach house next door, secretly studying the "wild mating habits" of
Southern California teenagers who hang out at the beach and speak in strange surfing jargon. Frankie, on the advice of his friends, decides to begin flirting with Ava, a
Hungarian waitress at the local restaurant. Upset by his flirting, Dolores accidentally stumbles into the lap of Eric Von Zipper, the leader of the local
outlaw motorcycle club, The Rats. Eric refuses to let Dolores go, despite her repeated direct demands to release her, until professor Sutwell intervenes. Eric threatens Sutwell, but Sutwell uses a secret finger technique to paralyze him, and he and Dolores escape. Dolores develops a crush on the professor. Frankie becomes jealous and escalates the flirting with Ava. Sutwell attempts to develop a professional relationship with Dolores to help him understand the culture of the young surfers; she in turn interprets his professional interest in a sexual and romantic way. Ava develops sincere feelings for Frankie, who is merely using her to make Dolores jealous. Frankie tires of the games, and decides to confess his love to Dolores, who accepts and kisses him; however, when Ava intervenes and says that Frankie also told her that he loves her, Dolores breaks things off with him. Meanwhile, Sutwell's assistant Marianne also has romantic interest in the Professor, who is oblivious to her hints. Dolores introduces Sutwell to her friends, who tease him and mock him but also inadvertently help him learn to surf. One evening, Frankie goes off alone with Ava, but refuses her physical advances. Meanwhile, Sutwell shaves his beard off at Dolores's request in an attempt to appear younger, and once again remains oblivious to Dolores's romantic advances, instead focusing on his research. Von Zipper and his gang plot to bring down Sutwell, but accidentally sneak into Dolores's room where she is home alone. By chance, Sutwell hears Dolores screaming and again disables Von Zipper. He hugs Dolores to console her, only to be confronted by the surfing teenagers who were also running in to check on the screaming Dolores. They, like his assistant Marianne, assume that there has been sexual contact between Sutwell and Dolores. After returning to his office, Sutwell finally realizes the feelings that Dolores has for him and realizes both that Marianne has feelings for him and that he in turn has feelings for her. He kisses Marianne just as Dolores visits him, ending Dolores's attraction to him. After Dolores storms off, heartbroken, Frankie becomes angry, and brings his friends with him to confront Sutwell. They discover Sutwell's notes that he has been taking as he studies them, and are infuriated at being the subjects of his research. Sutwell escapes to the very restaurant where Ava works, but is discovered there by Frankie, Dolores, and all the other surfers. Frankie accuses Sutwell of playing with Dolores's heart. Sutwell then declares that Dolores was only using him in the same way that Frankie was using Ava, merely as a scheme to make the other jealous. Dolores, catching on to Sutwell's ruse, agrees. Just as a peace is being made, Eric and his biker gang enter and attack Sutwell. The surfers protect him, and a large-scale fight breaks out. After the surfers win, Sutwell offers to take Marianne with him to study in the North Pacific, and Frankie and Dolores reaffirm their love for one another. ==Cast==