An FBI agent finds himself crossing the gender line again in the name of national security in this sequel to the comedy hit Big Momma's House. Tom Fuller (Mark Moses) is a computer whiz who is under investigation by the FBI, who suspect he may be the man behind a dangerous piece of underground software that would allow terrorists and criminals to access secured intelligence files online. The Bureau is looking for a way to get inside Fuller's home to find out what he's doing when a golden opportunity presents itself -- Fuller and his wife, Leah (Emily Procter), are in the market for a nanny to help look after their three children. The FBI sends in Malcolm Turner (Martin Lawrence), who will once again impersonate feisty septuagenarian Hattie Mae Pierce, better known as "Big Momma." "Big Momma" gets the job, but while trying to dig up the truth about Fuller's possible criminal connections, Malcolm also finds himself developing a close relationship with the suspect's wife and kids. Malcolm also finds himself offering unlikely romantic advice to his new partner, Kevin (Zachary Levi), and developing a new appreciation of the day-to-day travails of his wife, Sherrie (Nia Long).