Down-on-their luck brothers, Lars and Ernie Smuntz, aren't happy with the crumbling old mansion they inherit... until they discover the estate is worth millions. Before they can cash in, they have to rid the house of its single, stubborn occupant—a tiny and tenacious mouse.

Despite her husband's doubts, a woman reaches out to her dead daughter with a psychiatrist's help.

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.