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

After Dr. Bill Harford's wife, Alice, admits to having sexual fantasies about a man she met, Bill becomes obsessed with having a sexual encounter. He discovers an underground sexual group and attends one of their meetings -- and quickly discovers that he is in over his head.

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.

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.

After witnessing his parents' brutal murder on Christmas Eve, Billy transforms into a Killer Santa, delivering a yearly spree of calculated, chilling violence. This year, his blood-soaked mission collides with love, as a young woman challenges him to confront his darkness.