Lovable schemer Zack Morris leads his pals on adventures at California's Bayside High School. The friends navigate relationships, final exams, school dances, breakups and more while frequently frustrating their principal, Mr. Richard Belding, who does his best to keep them in check.
Sandy and Greg are teenagers who go camping, despite warnings not to, with their friends. They soon encounter aliens, who are using the area as a hunting ground.
Kelly's grandpa invites the whole gang to his little hotel "The Hideaway" in Hawaii for summer vacation. They expect a marvelous time at the beach - without Belding. Upon arriving, they quickly learn that not only is Belding there, but they also have to help Kelly's grandpa from losing his hotel. Meanwhile Zack meets (again) the love of his life, Jessie and Slater bet with Lisa that they won't fight, and Screech gets kidnapped by the Pupuku clan.
