The family is getting ready for Christmas Eve when Uncle Karel arrives with presents and a live rabbit. Wife Marta would like to roast the rabbit for lunch on St. Stephen's Day, but husband Rudolf is unable to kill it. He also refuses to kill the carp for his widowed neighbor, Mr. Korejs. Their four little girls want to keep the rabbit alive and name it Frantík. Suddenly his wife has to be taken to the maternity hospital, so a neighbor drives her and the husband has to prepare Christmas dinner.
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.