When an accident in the school laboratory leaves them exposed to secret rays Elisabeth and Toby are left with ‘scientific’ super-powers. From this moment on the peaceful school day is thoroughly shattered by flying lawn-mowers, invisible cars, cloned headmasters, a rampaging T-rex and other inventions by these new-found geniuses. While Toby puts into practice harmless, peaceful and imaginative ideas, Elisabeth uses her powers for opposite purposes, always entirely for her own benefit.