As Marge scolds Homer for hanging up the house's Christmas decorations before taking down the ones for Halloween, a bored Bart and Lisa watch a television news broadcast in which Kent Brockman announces that all of America will have no snow at Christmas due to global warming. Soon, however, snow does begin to fall in Springfield; Professor Frink explains that due to the combination of radioactive steam from the nuclear power plant and airborne particulates from the city's tire fire, it is the only location in America with snow. Mayor Quimby declares the town a tourist attraction, and the residents quickly get into the holiday spirit as out-of-town travelers quickly converge on Springfield.
Overwhelmed by the sudden crowds at the Kwik-E-Mart, and seeing the money spent by the tourists, Marge begins to feel like a failure since she cannot afford to spend lavishly on her family. As she returns to the house, a family drives past and offers to pay $300 per night to stay there. She hesitantly accepts the offer; Homer is surprised to find this other family in the house, but Marge explains the situation and persuades him to turn the house into a bed-and-breakfast for the duration of the holiday season. They take in more guests as Christmas approaches, but Marge becomes irritated at their constant requests and complaints over shoddy service and activities. On Christmas Day, Marge finds the guests gathered in the living room and thinks they are going to confront her, but instead they surprise her by singing Christmas carols.
Meanwhile, Lisa buys gifts for the family that are intended to make her feel good about herself - such as a bag of radish seeds for Homer, and a book for Bart - rather than to be something the recipients can use. She is appalled to find Bart burning the book soon afterward, but their argument leads her to see that her gift-giving effort was misguided. She sells the gift Bart gave her and buys him a tablet pre-loaded with books and apps he can enjoy, and he gives her some money to donate to charity.