Frankie (Avalon) and Dee Dee (Funicello) are riding high on romance...until singing sensation Sugar Kane (Linda Evans) falls out of the sky -- and into Frankie's arms! Not to be outdone by the flying femme fatal, Dee Dee signs up for skydiving lessons with the guys. But when their sexy instructor (Deborah Walley) makes Frankie her after-school sweetheart, he must prove his devotion to Dee Dee with a death-defying free fall...and a summer of love she'll never forget!