Teenage beach party/spy spoof/musical comedy about a plot to bomb a music fair. As his boss is on vacation, a superspy's butler must come to the rescue, while being pursued by a trio of gorgeous assassins who're agents of F.L.U.S.H. Features George Barris hotrods, along with the musical talents of Gary Lewis and the Playboys, The Astronauts, The Knickerbockers, Freddy and the Dreamers, and the only film appearance of The Turtles.

International spies Napoleon Solo (Robert Vaughn) and Illya Kuryakin (David McCallum) travel around the globe in an effort to track down a secret formula that was divided into four parts and left by a dying scientist with his four of five daughters, all of whom live in different countries. His widow, Amanda, is murdered at the beginning by the counter-spies of the organization THRUSH. Evil THRUSH agent Randolph also wants the formula, and is aided by his karate-chopping henchmen.