Jeannie has been a happily married housewife for 15 years to her astronaut husband Tony Nelson and has a teenage son, T.J. When Tony is promoted to Colonel and is about to retire from the NASA space program, Jeannie decides to give him a celebration party in their backyard. However, egged on by his colleagues to retire with a dramatic flair, Tony breaks his promise to Jeannie for one more space flight (aboard the shuttle), this time with a female astronaut, Captain Nelly Hunt.

In the fourth of the highly successful Frankie and Annette beach party movies, a motorcycle gang led by Eric Von Zipper kidnaps singing star Sugar Kane managed by Bullets, who hires sky-diving surfers Steve and Bonnie from Big Drop for a publicity stunt. With the usual gang of kids and a mermaid named Lorelei.

A millionaire sets out to prove his theory that his pet chimpanzee is as intelligent as the teenagers who hang out on the local beach, where he is intending to build a retirement home.