A strange-looking cat appears at the McGuffles. It also can talk. Miss Moon realizes that the cat is the magician Adalbert, who desperately needs help because his spell did not quite work. He asks Miss Moon to turn him back into a human being. Nothing easier than that, Miss Moon needs only a few mouse hair as an ingredient for the potion. However, the search for a mouse is difficult because Adalbert is afraid of these rodents.

Tomorrow, Luke and his class will go to the zoo. Funny, Luke will not be afraid of tigers. Miss Moon believes that there is only one way to overcome fear: Luke must look at the animal face to face. To make it easier for her, she turns a big cat into a tiger cub. Unfortunately, Miss Moon did not take into account that the tiger is so small that it can get out of the cage. Together with Luke and Lola, she must catch the animal as quickly as possible, because magic is not constant...