Scooby, Shaggy and Scrappy are on their way to a Miss Grimwood's Finishing School for Girls, where they've been hired as gym teachers. Once there, however, they find that not only is it actually an all-girl school of famous monsters' daughters but there's a villainess out to enslave the girls. While working as gym teachers at an all-girls finishing school, Scooby-Doo, Shaggy and Scrappy-Doo get tangled up in a monstrous mystery.