It's Christmastime, and the Griswolds are preparing for a family seasonal celebration. But things never run smoothly for Clark, his wife Ellen, and their two kids. Clark's continual bad luck is worsened by his obnoxious family guests, but he manages to keep going, knowing that his Christmas bonus is due soon.

Disguised aliens set up a pet shop in a dusty Arizona town, hoping to lure local children with their adorable extraterrestrial critters.

Camp Hope is a summer retreat for overweight boys run by a kindly couple who make the campers feel comfortable with their extra pounds. But when tyrannical fitness guru Tony buys the camp, he puts the kids on a cruel regimen that goes too far. Sick of the endless weeks of "all work and no play," the kids stage a coup and reclaim their summer of fun.