It's half-term, and the girls are off on a "strictly no magic" camping trip with Miss Drill and Miss Hardbroom. Mildred soon breaks this rule, after she attempts to lighten their loads. After a lot muttering and moaning, the group arrive at their destination, only to find they have been double-booked with a team of Canadian boy scouts. Much to Miss Hardbroom's displeasure, the two groups decide to "embrace the democracy of the great outdoors" and share the campsite. The girls are getting along extremely well with the boys and Miss Drill is getting on even better with their team leader, Serge Dubois. But Miss Hardbroom is convinced it will all end in disaster and resolves to have nothing more to do with the trip. The next day, Miss Drill and Serge decide to send the group on a treasure quest. Of course Ethel and Drusilla are on one team, and Mildred is on the other. Ethel lets her competitiveness get the better of her when the other team gets to the treasure map before her. She magics ...