By mistake, the baroness gets Miss Moon's magic key, which makes her magically change places. The Baroness imagines her goal is to be able to finally expose Miss Moon as a witch and enlighten Lady Pop about her nanny. Luckily, Miss Moon has a duplicate key that she and the kids use to stay one step ahead of the baroness. An exciting hunt through space and time begins.

A heat wave makes New York glow and the zoo's water has to be rationed, so that none of the animals has to suffer from thirst. But then an unknown thief steals the water from the zoo's own cistern and it comes to a state of emergency. To get water as fast as possible and to prevent the animals from dehydrating, Miss Moon creates a magic diviner that will show them the way to the stolen water. When the children find the thief, they are not surprised.

Luke's friends Finn and Ben are convinced that Lola and her friends are all nuts in basketball because they are girls. So Lola challenges the boys to a game in the afternoon, then they'll see who plays better basketball here. The girls are not really great, so Miss Moon trains them with a magic ball. But after training, Becky is so exhausted that she goes down. How can Lola compete with Lucy alone against the boys? Ask Monica? No way!