 Frank s nephew Charlie has arrived for another weekend visit to Cackle s. He s fed up with his own school and jealous of the fun the girls seem to have at the Academy, so he persuades his uncle to ask if he can become a pupil at the Academy. The Academy is busy planning celebrations for the commemoration day of their founder, Great, Great, Great Granny Cackle. Miss Drill seems sympathetic to Charlie s request but Miss Hardbroom is dead set against it, despite Miss Cackle wondering if it might not be time for the Academy to go coed. H.B. thinks it s a mistake to have boys at the Academy because it would distract the girls, and Miss Bat thinks boys can t chant properly. In the end, Cackle decides that H.B. should give the boy one of her tests as a way of proving his worth. She gives Charlie a math test, and as he s failing miserably, Mildred comes to his rescue with a spell. It gets out of control and has magic numbers flying everywhere! Charlie s hopes are dashed until Fenella and Griselda turn up with a book, which states that every boy who turns up at the founder s day feast must be automatically accepted into the Academy. But how to keep him from having to go home before then? Mildred decides to give him a magical case of the flu! This turns out terribly for Charlie, and Miss Bat s herbal cure makes him feel even worse. Miss Hardbroom then catches them in the act and announces that she knew what they were doing all along. Charlie however, doesn t think it s much fun to be a witch anymore, although he enjoys being allowed to stay for the Founder s Supper.