Cindy, a 12-year-old tomboy, is devastated when she learns that she hasn't been invited to a neighborhood birthday party. That night in bed, her fairy godmother visits her, tells her enough with this tomboy baloney, gives her a frilly new party dress and some rules on how proper young girls are to behave at parties.

This was Jerry Lewis' answer to the classic Cinderella story. When his father dies, poor Fella is left at the mercy of his snobbish stepmother and her two no-good sons, Maximilian and Rupert. As he slaves away for his nasty step-family, Maximilian and Rupert attempt to find a treasure Fella's father has supposedly hidden on the estate. Meanwhile, hoping to restore her dwindling fortunes, the stepmother plans a fancy ball in honor of the visiting Princess Charmein whom she hopes will marry Rupert. Eventually, Fella's Fairy Godfather shows up to convince him that he has a shot at winning the Princess himself.

In a far away, long ago kingdom, Cinderella is living happily with her mother and father until her mother dies. Cinderella's father remarries a cold, cruel woman who has two daughters, Drizella and Anastasia. When the father dies, Cinderella's wicked stepmother turns her into a virtual servant in her own house. Meanwhile, across town in the castle, the King determines that his son the Prince should find a suitable bride and provide him with a required number of grandchildren. So the King invites every eligible maiden in the kingdom to a fancy dress ball, where his son will be able to choose his bride. Cinderella has no suitable party dress for a ball, but her friends the mice, led by Jaques and Gus, and the birds lend a hand in making her one, a dress the evil stepsisters immediately tear apart on the evening of the ball. At this point, enter the Fairy Godmother, the pumpkin carriage, the royal ball, the stroke of midnight, the glass slipper, and the rest, as they say, is fairy tale history.