It is Christmas time and the McCallister family is preparing for a vacation in Paris, France. But the youngest in the family named Kevin got into a scuffle with his older brother Buzz and was sent to his room which is on the third floor of his house. Then, the next morning, while the rest of the family was in a rush to make it to the airport on time, they completely forgot about Kevin who now has the house all to himself. Being home alone was fun for Kevin, having a pizza all to himself, jumping on his parents' bed, and making a mess. Then, Kevin discovers about two burglars, Harry and Marv, about to rob his house on Christmas Eve. Kevin acts quickly by wiring his own house with makeshift booby traps to stop the burglars and to bring them to justice.

Kevin McCallister is back. But this time he's in New York City with enough cash and credit cards to turn the Big Apple into his very own playground. But Kevin won't be alone for long. The notorious Wet Bandits, Harry and Marv, still smarting from their last encounter with Kevin, are bound for New York too, plotting a huge holiday heist! Kevin's ready to welcome them with more battery of booby traps the bumbling bandits will never forget!