Kevin McCallister's parents have split up. Now living with his mom, he decides to spend Christmas with his dad at the mansion of his father's rich girlfriend, Natalie. Meanwhile robber Marv Merchants, one of the villains from the first two movies, partners up with a new criminal named Vera to hit Natalie's mansion.

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.

Ambitious overachiever Hanna just needs one more kid before her life is perfect. Instead, her baby daddy unexpectedly dumps her. Suddenly, she finds herself without a place to live, job or family. With every fiber of her being set for victory, Hanna refuses to give up and decides to win him back. But to get there means having to win something much more important, love and desire for herself and who she is.

Lara Jean's love life goes from imaginary to out of control when her secret letters to every boy she's ever fallen for are mysteriously mailed out.

Eight-year-old Kevin McCallister makes the most of the situation after his family unwittingly leaves him behind when they go on Christmas vacation. But when a pair of bungling burglars set their sights on Kevin's house, the plucky kid stands ready to defend his territory. By planting booby traps galore, adorably mischievous Kevin stands his ground as his frantic mother attempts to race home before Christmas Day.

After being left at home by himself for the holidays, 10-year-old Max Mercer must work to defend his home from a married couple who tries to steal back a valuable heirloom.