One evening, two fairies - Worry and Fortune with their young assistant Mina - are walking through old Prague. As it is Fortune's birthday, she decides to give people a gift - she enchants quite ordinary slippers to fulfill the wearer's every wish. The slippers then change hands that evening and everything they have ever dreamed of suddenly becomes a reality. But what people wish for is often very tricky, and it may not always bring one the desired happiness. Rather, it happens to be misery. Even Fortune becomes convinced of this when she realizes that happiness is something everyone must earn for themselves.