The Secret Seven haven't had a meeting for a while and only a couple of weeks remain of their holidays. So they visit the local fair, reluctantly taking with them Jack's annoying sister Susie and her friend Binkie. They have a lot to spend because Jack's mother has given him "a whole pound" to splash out with, and the others have managed to dig around for some spare pennies as well. But, after all the fun is over, the Seven see a fire up on the hill. They're first on the scene and call in the fire brigade while a small home burns to the ground. The owner doesn't seem to be around at first, but she soon shows up a woman with a baby in a pram, fretting about another child who should be somewhere about the place.