D.H. Lawrence employs a style that reads much like a fairy tale:
There was a woman who was beautiful, who started with all the advantages, yet she had no luck. She married for love, and the love turned to dust....There were a boy and two little girls. They lived in a pleasant house with a garden, and they had discreet servants, and felt themselves superior to anyone in the neighbourhood.
Ironically, however, this story is anything but a fairy tale with a "happily ever after" ending. For, the house is not happy; it is "haunted by the unspoken phrase: There must be more money!" and the children are not loved; only money is loved. The moral of this fairy tale is not a heartwarming one.
A very brief summary then - but really the best thing to do is to read this story for yourself. We are introduced to a mother who feels the lack of money keenly and feels her life is frustrated because of the lack of money. This lack comes to fill the entire house. In response, her son, begins to ride on his rocking horse in order to get more money, and supernaturally, the rocking horse tells him the name of winners in horse races, that he is able to bet on and thereby gain money. As this goes on and he wins more and more money he becomes more and more possessed by the rocking horse, finally gaining the name of the winner of the Grand National and earning his mother £80,000 but also dying in the process.