An FBI agent pretends to be an elderly female nanny to get close to the family of a suspected criminal. Malcolm Turner, an active duty FBI agent in the previous film, has now settled in to a safe and cushy desk job. He is expecting a child with his wife, Sherry, and he doesn't want anything to interfere with his ability to be there for her. However, when a close friend of his is killed while going undercover, Malcolm longs to do the right thing and take his place in the field. When a man named Fuller is revealed to have created a computer virus that can hack all secret government information, Malcolm volunteers to work the case but is denied. Peeved that he is being stuck to his desk, he lies to his wife, lies to his boss, and heads to Fuller's house himself, disguised as an obese elderly black woman named Big Momma. The FBI agent in place is attempting to go undercover as a nanny, but Malcolm as Big Momma successfully beats the agent out for the nanny position, keeping the FBI away and getting close to the family himself. He develops close relationships with Fuller's wife and two children, especially the oldest child, Molly, a teenager desperate to try to fit in. He takes them to school, helps them with their chores, all the while keeping an eye out to see if he can bust Fuller when he inevitably tries to sell his virus to the highest bidder. However, when Malcolm discovers a gang has been threatening the Fuller family in order to coerce Fuller into working for them. Malcolm must find a way to save the Fullers and bust those forcing him to do wrong, all but the FBI (and more importantly, his wife) find out what he's been up to.
Best part of story, including ending:
These movies aren't especially funny or original, but they're diverting enough. As far as family entertainment goes, one could do a whole lot worse.
Best scene in story:
In one sequence, Malcolm goes to the beach as Big Momma, and the sight of Big Momma in a bathing suit is pretty hilarious, not to mention terrific makeup.
Opinion about the main character:
Malcolm is blander here than he was in the first film, not given much real motivation to leave his wife and put himself in danger. Lawrence is fine, but the script is lacking.