Judy Moody is making a list and checking it twice, but all her brother, Stink, wants this year is snow. It hasn't snowed on Christmas in Virginia in more than a hundred years, so what are the chances that that will change? Enter the new mailman, Mr. Jack Frost, who not only looks like a jolly old elf but also seems to know a lot about weather patterns, has a fondness for the cold, and works looooooong hours during the holiday...