Four strangers are thrown together in a carpool when a bag of money, almost a million dollars, falls from a Brinks truck into their path. Because of circumstances, they are unable to turn in the money, and they struggle over what to do. They are pursued by thieves, the mob, and the police.

Scout Bozell has always dreamt of being on his school's Safety Patrol. The only reason he cannot join is because he is very clumsy. He's sent to another school because his old school would not let him become part of their Safety Patrol. But his new school does let him on the Safety Patrol.

Jeremy Carlisle's ex-wife Lynn is trying to stay away from her dangerously disturbed ex-boyfriend Tony, and Jeremy does all he can do protect his family.

When bachelor Walter Davis is set up with his sister-in-law's pretty cousin, Nadia Gates, a seemingly average blind date turns into a chaotic night on the town. Walter's brother, Ted, tells him not to let Nadia drink alcohol, but he dismisses the warning and her behaviour gets increasingly wild. Walter and Nadia's numerous incidents are made even worse as her former lover David relentlessly follows them around town.

A wealthy executive, Drew Latham (Ben Affleck) has no close relationships and becomes nostalgic for his childhood home as Christmas approaches. When he visits the house and finds another family living there, he offers the residents, Tom Valco (James Gandolfini) and his wife, Christine (Catherine O'Hara), a large sum of money to pretend they are his parents. Soon Drew tests the couple's patience, and, when their daughter, Alicia (Christina Applegate), arrives, things get increasingly tense.

It's vacation time for outdoorsy Chicago man Chet Ripley, along with his wife, Connie, and their two kids, Buck and Ben. But a serene weekend of fishing at a Wisconsin lakeside cabin gets crashed by Connie's obnoxious brother-in-law, Roman Craig, his wife, Kate, and the couple's two daughters. As the excursion wears on, the Ripleys find themselves at odds with the stuffy Craig family.