Malcolm Turner goes undercover, turning his slick-talking, slam-dunking Southern granny Big Momma disguise into a nanny for a computer company executive who may be concocting a means to hack into military databases. But that's just a pretense to get Big Momma coping with a perfectionist mom and her three kids, who are all dysfunctional in cute and easily resolved ways.

When Milford sells a large life insurance policy to 'T.J. James, ' a young man who says he's well-known, the broker thinks he has made a killing. But his elation is short-lived when he realizes that his new client is none other than Jesse James - who is already worth more dead than alive. Suddenly Milford finds himself saddled with a new commission: to go west, join the James gang and do everything possible to keep the deadliest outlaw in history...