The McCallister family go on a holiday trip to Florida. Kevin gets separated from his family at the airport, and manages to get himself onto a plane to New York instead. There, he checks into the world famous Plaza Hotel hotel with his father's credit card, and sets out to enjoy himself. Unfortunately, the burglars he had foiled before were in New York after escaping from jail, and had plans to rob the biggest toystore in New York on Christmas Eve. Kevin discovers their plan, and sets out to foil their plots again, while the burglars set out to finish off what they had not done before - the killing of the brat Kevin.