Instead of flying to Florida with his folks, Kevin ends up alone in New York, where he gets a hotel room with his dad's credit card—despite problems from a clerk and meddling bellboy. But when Kevin runs into his old nemeses, the Wet Bandits, he's determined to foil their plans to rob a toy store on Christmas Eve.
When plans with her boyfriend fall through, high school senior Chris Parker ends up babysitting the Anderson kids, Brad and Sara. What should be a quiet night in, however, turns into a series of ridiculous exploits, starting when they leave the house to pick up Chris' friend Brenda. Soon, Brad's buddy Daryl is involved, and the group must contend with car thieves, blues musicians and much more.