Eddie Garrick is a good-hearted man who has lost his belief in the wonder of Christmas. While spending time with his nine-year-old daughter Charlotte on Christmas Eve, he befriends a mysterious man in a red suit named Nick.
Young teenager Sam Witwicky becomes involved in the ancient struggle between two extraterrestrial factions of transforming robots – the heroic Autobots and the evil Decepticons. Sam holds the clue to unimaginable power and the Decepticons will stop at nothing to retrieve it.