The premise, on which every joke in the film relies, goes as follows: Nick Persons (Cube) is a bachelor living the high life in Portland, presumably enjoying the profits from his twee sports memorabilia store. The movie opens with Nick's purchase of a fully appointed Lincoln Navigator, a black behemoth that his 'hood-talkin' white friend (Jay Mohr) refers to as "6,000 pounds of respect."
On the same day that Nick drives the Navigator off the lot, he catches a windswept glimpse of Suzanne (Nia Long), a fetching party planner who works across the street. But Cube's friend warns him off, as she is a member of that most unpalatable of species, the divorcée. With kids! Cube, further advised by the animated Satchel Paige bobblehead mounted on his dashboard (yes), decides to steer clear.
But not for long. Later that day, stranded in a rainstorm with a dead battery, Suzanne plays the damsel in distress--and no man, not even Cube, can resist a C-cup with car trouble. He's hooked like Velcro, and his labors begin. First, it's simply a matter of ferrying Suzanne to and from work; then, at the last minute before she flies to Vancouver on business, her ex-husband bows out of child care. Nick could allow Suzanne to cancel her trip and lose her job, especially since, by this point, she has rebuffed his romantic advances. But he's a good guy (and hard-up), so he agrees to get the kids to the Great White North.
The next 75 minutes of Are We There Yet? are painfully, mind-numbingly subsumed with this attempt, which goes awry at every turn. The kids, Lindsey (Aleisha Allen) and Kevin (Philip Daniel Bolden), are hell-bent on sabotage, since they hope for a reunion between their parents. But even if they weren't obnoxious, Cube wouldn't care for them: His interests lie in protecting his own baby--the Navigator--and in earning brownie points from the lady with the rack. Still, coexist they must, since the entire motley crew must get to Vancouver to be with Suzanne on New Year's Eve.
It will come as no surprise that Cube wins the hearts of the kids and, through them, that of their uninteresting mother. In the meantime, he wrecks the Navigator, but learning to corral Suzanne's sass-monsters has taught him that his beloved ride is "just a material possession." Thereafter, we're expected to swallow platitudes about daddies who leave their kids and, simultaneously, to enjoy the new-found affection between Nick and Suzanne's children, even as it's predicated upon their paternal abandonment.
It's all a big, boring failure of slapstick and degradation, in which we must witness the taking-down not merely of Cube but of Satchel. Of course, that's not to say your kids won't like it. The audience at a preview screening laughed, though not as often as the film certainly intends. Kids who triumph over adults are the stock-in-trade of family comedy, and that kind of topsy-turvy universe offers real fun for children--especially since kids aren't likely to notice that the dialogue is nothing more than rehashed sitcom fare.