Summer is back and so are Frankie Avalon, Annette Funicello and the rest of the "Beach Party" gang, as they return to the sand and surf in search of that perfect wave! But there's choppy water ahead when the gang finds their beach has been invaded by a team of muscled-up bodybuilders. And the temperature rises when a beautiful Italian countess, Juliana "Julie" Gioto Borgini (Luciana Paluzzi), arrives looking to snag the brawniest of the crew, Mr. Galaxy (Peter Lupus), and to fund a chain of gyms. Except as soon as Julie sees Frankie (Avalon), she forgets all about Mr. Galaxy! Now it's a battle for turf between the beach kids and the muscle men...and between Julie and Dee Dee (Funicello) for Frankie's heart! Featuring the music of Dick Dale and the Del Tones and Stevie Wonder – and film legend Peter Lorre – get ready for the wildest beach party ever! Directed by William Asher, and also starring Don Rickles, Buddy Hackett, Morey Amsterdam, Jody McCrea, John Ashley and Peter Turgeon.