It is Christmas Eve. The little Ghastlys are not expecting Father Christmas to bring them presents because he never does. But Princess is determined that they shall hang up their stockings and is sure that this year he will come.
Princess doesn't know that the little Ghastlys haven't always been good, and maybe that is why Father Christmas never been before.
When a baby reindeer falls off a sleigh, the little Ghastlys try their hardest to find Father Christmas to take the reindeer home. They even go to the North Pole to see if he is there, but of course, on Christmas Eve he is too busy to be at home.
This is the sixth book in the series and the Ghastly family are now established at the Ghostly Ghastly House, which is popular with the visitors to the town. Branwing and Princess are now married and back from their honeymoon, and the little Ghastlys are becoming fixit ghosts.