Divorced toy company executive Scott Calvin is pleased to have his son Charlie for Christmas, though the boy himself isn't happy about it. But when Santa Claus accidentally topples off the roof of the house and falls with a thud in the snow, Scott finds himself taking the merry old elf's place and earning new respect in his son's eyes.
When the night ends, the reindeer take them to the north pole, and Scott discovers that by donning the fabled red suit, he's inadvertently agreed to become the next Santa Claus.
Scott now has to deal with his suspicious ex-wife and her psychiatrist boyfriend, who both think he's playing tricks with Charlie's mind, and also with his own out-of-control body, which is putting on weight and growing a prodigious beard.
Six year old Susan has doubts childhood's most enduring miracle Santa Clause. Her mother told her the "secret" about Santa a long time ago, so Susan doesn't expect to receive the most important gifts on her Christmas list.
But after meeting a special departement stare Santa who's convinced he's the real thing, Susan is given the most precious gift of all - something to believe in.
Eight-year-old Kevin McCallister (Macaulay Culkin) has become the man of the house overnight. He is a troubled 8-year-old who doesn't comfortably mesh with his large family. He's forced to grow a little after being accidentally left behind when his folks and siblings fly off to Paris, rushing off on a Christmas vacation.
Home alone, Kevin gets busy decorating the house for the holidays. But he's not decking the halls with tinsel and holly. Two bumbling burglars are trying to break in, and Kevin's rigging a bewildering battery of booby traps to welcome them.