At Nadini College (a private girls school in Cap Ferrat, France) 3 girls are fooling around in the basement with a beginners guide to magic spells. It seems to be a dud and they run off when their principal comes downstairs to investigate the noise but they've awakened something and in engulfs the principal and covers the basement in slime. At Torrington Academy Martin is more interested in flirting with girls than studying for exams which infuriates Diana so she manipulates him into a wager that he can't go a week without flirting. Martin's not too happy about this but he hates to lose a bet so he's stuck. Java notices a door that wasn't there before and they enter it to find themselves at Center. They're sent to Nadini to investigate the principal's disappearance giving Martin the problem of being surrounded by girls while trapped by Diana's bet. In the slime covered basement Diana finds a necklace with before the acting principal arrives.
Dans une pension, des étudiantes invoquent par accident une vieille sorcière. D'étranges événements s'ensuivent. Martin, Diana et Java sont envoyés à l'école pour enquêter. Diana découvre que la nouvelle directrice n'est autre que la sorcière. Son but est de placer les étudiantes sous sa dépendance...
En un internat només per a noies, tres estudiants baixen al soterrani amb una taula de ouija i convoquen sense saber-ho una antiga bruixa. Quan comencen a passar coses estranyes a l'escola, en Martin, la Diana i en Java son enviats a investigar. La Diana s'infiltra d'incògnit com a estudiant i descobreix que la bruixa, que es fa passar per la nova directora, té com objectiu convertir a totes les estudiants en bruixes per dur a terme la seva venjança.
