This 2006 comedy continues on the story of FBI agent, Malcom Turner (Martin Lawerence), going undercover yet again for another big case involving murder and Government espionage. Turner, Lawerence, goes undercover to investigate the suspected hacker, Tom Fuller, that created a computer "worm" that allows access to highly confidential government files, but this case isn't a walk in the park. In order to even get close to Fuller Turner must once again don the Hattie Mae Pierce alter-ego known as Big Momma as the Nanny at the Fuller family's Orange County home.
But once inside the home Big Momma's problems are all to real when she's faced with juggling both working as the nanny to very bad and misbehaving kids, a problem he's all too not suited for, and the woman of the house, Leah, suspected of murder.
Throughout the film "Big Momma" brings the broken Fuller family back together while also learning a valued lessons concerning his own life in dealing with his own stepson, Trent, and his expecting wife Sherrie.