Arnold and Gerald decide to take the bus a bit too far and miss the play that they are characters in, since Helga is in charge of it. Later, when Eugene's bicycle is ruined thanks to Arnold, he decides to take him out for a day of fun.
With fourteen beautiful inches of powdery snow, a blizzard has transformed Arnold's city into a winter play-land. But with the list of chores Grandpa has handed him, it could be July before he gets to play in it.
Arnold's best laid plans for the "ultimate Saturday" go up in smoke when he tries to complete all of his favorite things to do in one afternoon.On a boring summer night Grandpa tries to liven things up by telling a story about haunted Train Number 25.
The boarders are all suspicious of the mysterious Mr. Smith who lives behind door 16. Oscar Kokoshka moves in with Arnold when his wife, Susie, throws him out of their apartment following another fight.
Helga has Christmas all figured out. It's about cash and presents and getting what you wish no matter what. But Christmas Eve finds Arnold searching to find a gift for Mr. Hyunh-and it's one that no amount of money can buy. Mr. Hayunh's only wish is to be reunited with the daughter from whom he was separated by the misfortunes of war many years ago. She's somewhere out there in the snow-covered city. And it just might take a Christmas Angel to find her.