Eight very different couples deal with their love lives in various loosely interrelated tales all set during a frantic month before Christmas in London.

Leipzig, December 1734: Christmas brings the Bach family together. The first snow has fallen and the children Gottfried and Elisabeth are delighted about the arrival of their older brothers Friedemann and Emanuel. The Thomaskantor has retired to his music room. Anna Magdalena supports her husband, as there are only a few days left and his latest work, the six-part "Christmas Oratorio", must be finished on time. It is awaited with suspicion by the city council and the gentlemen of the consistory, who have long found Bach's waywardness a thorn in their side and fear that, after the premiere of the St. Matthew Passion a few years earlier, the St. Thomas Church will once again be filled with "operatic" music. With the oratorio, Johann Sebastian Bach hopes that he will finally become court composer in Dresden. And, as always, he demands that all members of the family join forces to help him. But differences of opinion are increasingly delaying the completion of Bach's most famous work.

Eight-year-old Kevin McCallister makes the most of the situation after his family unwittingly leaves him behind when they go on Christmas vacation. When thieves try to break into his home, he puts up a fight like no other.

After two American prisoners are killed by guards in the act of escaping from a German POW camp in World War II, barracks black marketeer J.J. Sefton is suspected of being an informer.

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.

Low-level bureaucrat Sam Lowry escapes the monotony of his day-to-day life through a recurring daydream of himself as a virtuous hero saving a beautiful damsel. Investigating a case that led to the wrongful arrest and eventual death of an innocent man instead of wanted terrorist Harry Tuttle, he meets the woman from his daydream, and in trying to help her gets caught in a web of mistaken identities, mindless bureaucracy and lies.

A medieval English knight is magically transported to present day where he ends up falling for a high school science teacher.

During a post-Christmas play date, the gang find themselves in uncharted territory when the coolest set of action figures ever turn out to be dangerously delusional. It's all up to Trixie, the triceratops, if the gang hopes to return to Bonnie's room in this Toy Story That Time Forgot.

A small suburban town receives a visit from a castaway unfinished science experiment named Edward.

Bud Baxter is a minor clerk in a huge New York insurance company, until he discovers a quick way to climb the corporate ladder. He lends out his apartment to the executives as a place to take their mistresses. Although he often has to deal with the aftermath of their visits, one night he's left with a major problem to solve.

A timid, overworked and underpaid bookkeeper needs a $10 raise to marry his sweetheart...

Will Freeman is a good-looking, smooth-talking bachelor whose primary goal in life is avoiding any kind of responsibility. But when he invents an imaginary son in order to meet attractive single moms, Will gets a hilarious lesson about life from a bright, but hopelessly geeky 12-year-old named Marcus. Now, as Will struggles to teach Marcus the art of being cool, Marcus teaches Will that you're never too old to grow up.